Duramax Bad Ecm Symptoms

Duramax Bad Ecm Symptoms

Duramax Bad Ecm Symptoms

The only way this can be diagnosed is to have the engine running and look at all of the values on the scan tool. The sudden jerking will have you suspect the transmission system, having it checked if there are problems with the gears or so. Re: Duramax LB7 Smokes at idle Ray, I had a 2002 GMC 2500HD with the Duramax and I had problems with the injectors that caused excessive smoking at idle. There are a number of reasons why diesel fuel injectors go bad or fail, and sometimes it depends on the particular truck or injector we're talking about. I called our supplier and we both figured the motor control was bad.


how would his not be affected? his car is at a shop where they want $1200. See what causes these high pressure injectors to fail in this month's issue of Diesel Power. I have access to an ECM, PCM, BCM and TCM from a 2007 Sierra that I can try swapping over modules to help troubleshoot the problem if they are compatible. Took it off, cleaned it, no problems since. First step: Take off all the A9L’s clothes. You will find it dirty, greased build-up and full of pollutants.


It's used to regulate many systems and subsystems in your car's engine, drive train and other major components. Bad EGR valve symptoms vary and resemble problems in other engine systems. 6 Duramax Engine. Bad PCV valves can cause engine oil contamination, sludge build-up, oil leaks, high fuel consumption, and other engine-damaging problems, depending on the type of failure. Wouldn't restarts so put on the code reader and a thermostate temp code showed. Truck of my dreams became a nightmare! I custom ordered a $64,000 2011 Chevy 3500 HD crew cab LTZ loaded with a Duramax. What other symptoms are there? I never tested one per say, just hit the local U-Pull it and grabbed a used one to replace it whenever I thought that was the problem, not that expensive.


GM 12606126 New LBZ Duramax Diesel ECM (06-07) This is a Genuine GM Duramax Diesel replacement electronic control module (ECM). The fan will run but the compressor won't come on. Welcome to www,autocomputerperformance. So it's a little nerve-wracking to think that the ECM can go bad just like any other car. If the ECM is bad, I am going to put a thundermax closed loop system on the bike ,but I have to be sure the ECM is faulty. If diagnosis is still "bad ECM", then ask for written work order that includes diagnosis including fault codes it is based on, and description of the fix including cost like ECM module, programming, any additional labor. I really hope they will get it good and hot, ride it stop and go traffic for a half hour on a hot day or something. Bad Distributor Cap Symptoms.


Duramax Diesel Injectors from Sinister Diesel The two main reasons Duramax injectors fail are every day wear-and-tear and contaminants in low quality fuel. Change the channel Select Site Singletrack Snow Singletrack Tech Singletrack Charged GritCX. I had a Ford F-250 with a V-10 and the power was good but the gas mileage wasn't good at all. A bad dual-mass flywheel will cause the engine to shake and feel like a miss.


4 ECU ECU Fuel Pump Control Circuit Repair Repairing Your Own LH 2. Let Hot Shot's Secret help you diagnose and solve your excessive white smoke issues with your 6. 6L Diesel - DTC P0201, P0204, P0206, P0207, P0202, P0203, P0205, P0208, P1262. Learn how to tell if you have a faulty ECU. I have had this problem The signs of a bad transmission control module often are as follows: 1.


One such vehicle has such a bad reputation for head gasket problems there is a group of owners trying to get the manufacturer to have a recall on them. 00 Find or Sell any Parts for Your Vehicle in USA Parts for Sale. The check engine light and the exhaust gas light are both on. 6 Diesel Common Issues and Problems If you have a 2001-2004 Duramax 6. 0 FICM Repair, PHP Tuning and Truck Parts MY ACCOUNT. Bad PCV valves can cause engine oil contamination, sludge build-up, oil leaks, high fuel consumption, and other engine-damaging problems, depending on the type of failure. You will find it dirty, greased build-up and full of pollutants.


5-2005 LLY Duramax Diesel. The first generation was the LB7, produced from 2001 through 2004. Common Issues and Problems We See In The Shop With The LB7 6. 6 Duramax Common Issues, Problems, and Fixes GMC and Chevy Duramax LB7 6. 5 Bad Symptoms.


Reinstall both cables to battery. If there is any sort of an air leak anywhere between the tank and the IP, it will suck air and not pull fuel from the tank. The ECM will now receive the correct reading, and, after a certain amount of time, it will extinguish the light, and delete the code. Not saying that your ECM isn't bad but keep your eyes open. Fuel Injector Driver Module for LLY & LB7 Duramax engines.


hello, i haven't had a chance to check this out myself yet, but my son was told his ECM is bad on his 2000 Sentra. Chevrolet/GMC Duramax Diesel Supplement (GMNA Localizing-U. This device allows you to clear and read out diagnostic trouble codes. I check the computer for sensor codes that might be going bad and the only one that came up was a Crankshaft possession sensor (Code: P0335). A bad mass air flow sensor will make very hard for the ECU incrementing the necessary amount of fuel during sudden acceleration.


The design and labor costs dictate a complete set replacement in most cases. The FICM is the Fuel Injector Control Module that sends the signal to the injector to open or close. Only stalls out once a day. ve also heard of fuel psi sensors going bad. Toploaders are tough as nails, that metal in there probably didn't hurt anything. With the opportunity for GM to overtake both Dodge and Ford’s latest diesel offerings GM delivered an impressive 910 lb ft @ 1600 rpm and 445 hp @ 2800 rpm with their new L5P Duramax.


Symptoms of a Bad or Failing ECM-Power Relay If there is no power when the key is inserted, the engine will not start, or the battery is dead, you may need to replace the ECM power relay. Re: Duramax LB7 Smokes at idle Ray, I had a 2002 GMC 2500HD with the Duramax and I had problems with the injectors that caused excessive smoking at idle. If your vehicle's engine control unit were to ever go bad, you would have a wide range of problems come up. In addition to the 2001-2004 LB7 Duramax, Kennedy Diesel (KD) also offers custom ECM tunes for the 2004. How the Engine Control Module Works. The truck, a 2004 Chevy with a fueled and hot LB7 Duramax engine, was a little harder to start than usual. This can make troubleshooting difficult and often results in misdiagnosis of a bad computer. 7V from high to low at rest is a very bad sign.


Does the ECT sensor send information to the ECM only? or does it also send information to the guage? Can the ECT work sporadically? or is it an all or nothing kind of deal?. All 2004 to 2016 Duramax diesels feature a Garrett GT3788VA variable geometry turbo. See what causes these high pressure injectors to fail in this month's issue of Diesel Power. Still, if you recognize one or more of these symptoms, try to diagnose the problem as soon as possible. 8L Duramax had. The truck, a 2004 Chevy with a fueled and hot LB7 Duramax engine, was a little harder to start than usual.


If you need a Chevy ECM not listed here, call us to check availability. If there is any sort of an air leak anywhere between the tank and the IP, it will suck air and not pull fuel from the tank. A duramax doesn't have an electric fuel pump. The major sign is that it will give erroneous or non-existent codes when you scan the ECM with a code scanner. I figure it was a solid 50 hours of work for me taking my time after work and weekends. 4 Symptoms of ECM Failure.


Re: Duramax LB7 Smokes at idle Ray, I had a 2002 GMC 2500HD with the Duramax and I had problems with the injectors that caused excessive smoking at idle. Is this possibly a bad ECM? Almost forgot, build is a supercharged Iron 408, 243 (Ls2) heads, 2006 Corvette M6 As i said, I'm new so ill try to post the tune and the scan logs i have, but the scan stops logging as soon as the MIL comes on and right before it surges, like the ECM just stops communicating for a spit second. In such a scenario, the ECU will sense the drop in engine vacuum first and then using other sensors data will decide if more fuel is required. Newer model cars have a PCM, or Powertrain Control Module instead of an ECM or ECU. Many of these systems allow you to choose either a stand alone pump, or a pump with fuel filters and water separators which removes entrained air, reducing the chance of injector failure.


To restart it I have to turn everything off and let it sit for 30 seconds and then it will start up and drive again for a while. ) Check for an intermittent ground wire between connector and sensor. I had issues with my idol at a stop light where the truck wanted to die but would not come to that. Common Symptoms of Bad Engine Control Modules There are various symptoms of a failed or failing ECM depending on what circuit is damaged. 8L, VIN K, option L36, Throttle Cont. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation. 6L Duramax diesel.


by Eduardo Ruelas on. You think yours looked bad, I took one that had sat outdoors under an oak tree without a top cover for years, cleaned the dirt and leaves out, flushed it repeatedly with diesel and oil and got the thing shifting like new. 41=CKP sensor bad 77 misc. The ECU, or engine control unit, is a major component of your car's onboard computer. there are different signs for different problems.


(Instrument Panel Computer). Use the search at the top of the site to find items related to gmc 6. On a lly if u can not get any gauges on the insturment panel to work wiggle the blue wire connected to the ecm. In order to help avoid accidental air bag deployment and personal injury, whenever. I would have started with checking power supply voltage and stability, powers & grounds, and start resistance testing the ECM pins per FSM. 6 Duramax pickups are a multi-layer steel style gasket. Took it off, cleaned it, no problems since.


but it is still real hard to crank and when it finally does it runs real rough until it warms up then it runs good. This was the most major failure that put a bad taste of Duramax into owners’ mouths. It is advisable to clean the injectors every 25,000 to 30,000 miles to ensure that they do not get. You might have a bad ground, causing voltage problems to the ECM. 6L Duramax diesel. Wouldn't restarts so put on the code reader and a thermostate temp code showed. On a lly if u can not get any gauges on the insturment panel to work wiggle the blue wire connected to the ecm. Failure Symptoms:.


Problems with the crankshaft position sensor will often present as problems with engine timing. A bad dual-mass flywheel will cause the engine to shake and feel like a miss. If you need a Chevy ECM not listed here, call us to check availability. The ECM board was showing communication with the motor control. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles.


This map is intended to be run only at start up and for a few minutes until the car reaches operating temperature, at which point the ECU will modify or switch maps to run more lean and less fuel. Only stalls out once a day. At Injectors Direct, we specialize in replacing 2001 and up Chevy and GMC Duramax , 2003 and up Dodge Cummins , and 2003 and up Ford Powerstroke. Below is a helpful guide to determine if you have a faulty ECU.


Choose from refurbished A-Grade or B-Grade, as well as factory NEW. My brother installed a radio in a Ferrari many years ago and was amazed to find it only worked when the parking brake was on. SIA Electronics has many other repairs available. Fuel injector symptoms for bad, faulty, dirty, clogged, leaking injectors: poor starting, idle, performance, fuel consumption, failed emissions, detonation. The truck, a 2004 Chevy with a fueled and hot LB7 Duramax engine, was a little harder to start than usual. Check out the 10 ways you're killing your diesel engine with these easily avoided common mistakes. remedy: dealers will reprogram the ecm free of charge. If there is a vacuum leak, the ECM may be unable to compensate.


) MAF Sensor - A MAF sensor that causes the ECM to sense a lower than normal airflow will cause. If you can get your hands on another ECM, try swapping that in and see what happens. Of course, there are many possible reasons for why this warning light would illuminate. The LML Duramax power was an impressive 397 HP @ 3000 RPM and 765 lb ft @ 1600 RPM.


I called our supplier and we both figured the motor control was bad. The ECM/PCM set the OBDII code set when the ECM/PCM Power Relay is out of factory specifications. Note, B-grade is cosmetically flawed and may have a cracked or chipped receptacle that will not affect durability or function. We can save you the time and money by testing your ECU DME before spending on costly diagnostic labor and sensors. 8 volts from a wrench) and when I used a higher range to check for voltage at the harnesses, I got zero voltage. The engine control module (ECM) controls the fuel pump pressures by using two fuel pressure regulators, fuel pressure regulator 1 is located on top of the fuel injection pump and fuel pressure regulator 2 (7) is located on a fuel rail (2).


I shut it off, banged on the tcm, cleared the codes (I got ECM U0101 and ECM P0700), then drove home with all the same issues and it was locked in 3rd gear. if your ecm is bad, first off the car won't start, your fuel pump won't work, no spark, basically everything shuts down Ok the above can be symptoms of a bad ECM, But that's not the only answer. I removed the ECU and opened it up and it looks clean but of course that doesn't mean it has not failed. Take "BOTH" battery cables off. 6L Diesel - DTC P0201, P0204, P0206, P0207, P0202, P0203, P0205, P0208, P1262. Low fuel rail pressure is a very common issue we see on Duramax trucks. I d/c'd the VA as well but this did not help the symptoms any. While all iterations are fairly reliable, the older '01-'04 LB7 engines and '04.


Five signs and symptoms of a failing or bad engine control module (ECM) RJ Frometa April 24, 2018 Entertainment News 1 Comment 9,462 Views The engine control module (ECM) plays an important role in all modern vehicles. Any mods to the car? When was the last time you cleaned your maf sensor?. 2 ECU 561 ECU Workaround Buying a Used ECU Buying a Remanufactured ECU 760T Engine Stops Dead at 60MPH; Bad Power Stage Module 700/900 ECU/AMM Reference Chart Abbreviations: AMM Air Mass Meter. Customer Replaced ECM Now A No Start, No Lights, NO NOTHIN! Ford Focus & Fiesta Powershift Dual Clutch TCM Failure Symptoms. Let Hot Shot's Secret help you diagnose and solve your excessive white smoke issues with your 6. Normally I should have 12 V on the injectors with ignition on after 2 seconds, that does not happen to both of them, that worries me and points to the ECM being bad. Symptoms Of Bad Oil Pressure Switch Can anyone tell me what the symptoms of a bad oil pressure switch (sending unit)? I believe my car may have a bad one, but I want to be sure before I replace something that doesn’t need replaced. hello, i haven't had a chance to check this out myself yet, but my son was told his ECM is bad on his 2000 Sentra.


The Duramax has a multi-layer steel head gasket. While all iterations are fairly reliable, the older '01-'04 LB7 engines and '04. ) Poor ECM to engine block ground. I have a 2008 Chevy Duramax diesel 2500HD truck with 65,000 miles.


If the ECM is bad, I am going to put a thundermax closed loop system on the bike ,but I have to be sure the ECM is faulty. Who told you it's the oil pump?. A mechanical problem that a technician fails to recognize (or recognizes but fails to fix properly) is often blamed on the ECM. According to thefactory Service manual the engine coolat temperature sensor is something that, when bad, can cause a rough idle, misfire, and general porr running of the engine.


This is what a bad ECM looks like!!! 5. When the EGR system operates, the ECM is essentially looking for a change in the MAF (mass air flow) signal to verify that a part of the engine's combustion "air" is coming from another source than the air box. Bosch refers to it as an ECU. Generally, most owners and service techs are well aware of the importance of keeping a clean fuel system by running clean, high quality fuel, lubricity additives, and routine fuel filter changes along with all.


I did the head gaskets on my 01 last fall and it wasn't that bad, just LOTS of parts to take off and keep track of and lots of time. The ECM will now receive the correct reading, and, after a certain amount of time, it will extinguish the light, and delete the code. Please see our terms for use of feeds. The IAC valve position is referred to as IAC counts. MAP sensors fail by getting clogged, contaminated, or damaged. The Top 5 Symptoms of a Bad Car Engine ECU. I have had people blame the ECM for everything from bad valve timing to CB radio interference. The power gain with higher fuel mileage is a dream come true.


A bad relay may. symptoms of bad pcm 2001 dodge durango 4. I check the computer for sensor codes that might be going bad and the only one that came up was a Crankshaft possession sensor (Code: P0335). PCM / ECM Processor Fault. On the other hand, more power wouldn't be a bad thing.


I am trying to diagnose a problem with my truck and figured this would be a helpful way. When it did start, it blew blueish-white smoke at an idle. It turns out the DC low range setting on my meter is bad, (I got 2. One day the voltage (checked with a volt meter) will be almost normal, the next too high.


The fuel level sensor is a simple float device which returns an electronic signal with the fuel level to the Engine Control Module (ECM). 2 ECU 561 ECU Workaround Buying a Used ECU Buying a Remanufactured ECU 760T Engine Stops Dead at 60MPH; Bad Power Stage Module 700/900 ECU/AMM Reference Chart Abbreviations: AMM Air Mass Meter. Head Gaskets – As these truck reach the 100,000-150,000 miles we are seeing more and more head gasket issues. " The repeated click sounds like a bad ECU, but his 3500rpm problem sounds like a bad boost leak. The Duramax has a multi-layer steel head gasket.


Duramax Diesel Tech Articles; How to Know if You Have Bad Duramax Head Gaskets and What To Do About It; How to Know if You Have Bad Duramax Head Gaskets and What To Do About It. + Items in search results. But it is important that you recognize these symptoms as they arise, so you can do something about it right away. When its all cooled down, remove the EGR valve (between your alternator and oil filter - it looks like a 7-ounce beer can with wires going to it) and look inside with a flash light. Fuel Injector Driver Module for LLY & LB7 Duramax engines. If you dont want to replace your ECM make sure you follow these 3 tips to keep your truck running after you tune it. Now you're down to three things that could be responsible for your no-start or intermittent ecm malfunction condition: the engine computer or the wiring or a bad ecm.


The engine control module (ECM), also sometimes called the engine control unit (ECU) or powertrain control module (PCM), is essentially the computer that directs your engine. (800)737-0915 This is a repair & return for your Duramax FICM. The topic 'Blown (or on its way out) Turbo on a turbodiesel…symptoms ?' is closed to new replies. One could test that switch 12 times a day every day of the month and still be bad even if shown good every time. Symptoms Of A BAD Thermal Fan Clutch. If you have a bad engine control unit in your vehicle, the symptoms will become more than obvious. I have a 96 and have, myself, experienced a failed ECM and BOY is it hard to diagnose.


Other GM ECM's available. when i look up the recall it says like 576,000 cars. 2V is the most definitive, because it means for sure that a cell has gone bad. The biggest problem was the injector flaws from the LB7. Reinstall both cables to battery. No series of clicks, just silence. The topic 'Blown (or on its way out) Turbo on a turbodiesel…symptoms ?' is closed to new replies.


We know the programming secret to raise boost to the maximum safe level without one. Does the ECT sensor send information to the ECM only? or does it also send information to the guage? Can the ECT work sporadically? or is it an all or nothing kind of deal?. 3 Tips to Prevent 2001-2005 Duramax ECM's From Crashing! Diesel Tuner's Blog. The Mishimoto Chevrolet Duramax low temperature thermostats activate at a lower temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in warmer climates, or use their trucks under heavy load or strenuous drivin. With the opportunity for GM to overtake both Dodge and Ford’s latest diesel offerings GM delivered an impressive 910 lb ft @ 1600 rpm and 445 hp @ 2800 rpm with their new L5P Duramax. by Ed Ruelas on.


You might have a bad ground, causing voltage problems to the ECM. Symptoms of a Bad or Failing ECM-Power Relay If there is no power when the key is inserted, the engine will not start, or the battery is dead, you may need to replace the ECM power relay. Duramax LMM ECM problems If this is your first visit, be sure to check out the FAQ by clicking the link above. Welcome to www,autocomputerperformance. Common Issues and Problems We See In The Shop With The LB7 6. 4 Symptoms of ECM Failure. If you notice that even the problem occurs once the transmission warms up but also happens at any temperature this could be a module or ground, wiring issue or a electronic.


6L Duramax diesel engine is a powerful and reliable engine used in Chevy and GMC products. When u get the truck to fire up and it lopes very very bad take the back side of your blue connecter apart and play with the wires and pins in there That was are problem. What You Need to Know About Duramax Balance Rates The Duramax has proven to be a reliable engine since its introduction back in 2001. If a transmission ECM or TCU goes bad or needs repair, fuel economy and efficiency, as well as smooth transmission functions are lost.


Finally i pull the ECU and i find a Capacitor that is begining to bust and one that has started to melt to the board!! So i decide to replace all three on the board and reinstall on the car! GAH i hoped my solder skills are good enough and it starts!! lol so i start the car and she fires up!. Chevrolet/GMC Duramax Diesel Supplement (GMNA Localizing-U. Symptoms Cranks, does not fire, does n NO START MYSTERY: Bad ECU/PCM?? cranks, FP stays on KOEO - Ford Ranger Forum Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > Engine Tech Forum > 6-Cylinder Tech > 3. Fuel transfer from the tank is handled by a supply pump contained within the injection pump assembly. Testing Codes: P0117, P0118. Another symptom of a bad or failing ECM is erratic engine behavior. Toploaders are tough as nails, that metal in there probably didn't hurt anything.


However, instead of using bursts of high pressure or lube oil pressure, the Isuzu/Bosch team decided to jack the fuel pressure up with a special pump and control the injection with a special module, high voltage and. The best way to increase your diesel truck's fuel mileage is to upgrade with a MPG Performance Module or Duramax Tuner. Duramax Injector Failures-Cause and Prevention LB7: Many LB7 owners have had injector issues. There are many symptoms that can be associated with a faulty ECU. In light of this no man is.


Symptoms of Bad LH2. The check engine light and the exhaust gas light are both on. If you don't find your answer below, please contact us for assistance. Conservative treatment is a real possibility in the case of ECU subluxation, with casting or splinting indicated if the injury to the ECU tendon sheath is not too severe. DTC P1093 Fuel Rail Pressure Low During Power Enrichment The engine control module (ECM) uses the fuel rail pressure (FRP) sensor to determine fuel pressure to the fuel injectors. The sudden jerking will have you suspect the transmission system, having it checked if there are problems with the gears or so.


Fortunately, it isn't that bad yet with automotive PCMs, but it has become a crutch for automakers who rush products to market that aren't quite ready. Once the pedal is moved out of that particular "bad" spot, it will again start reading properly. Check Engine Control Module (ECM) for Modifications Old Style Chip Tuning where actual Chips are replaced may have resulted in bad Soldering or otherwise broken the ECM. 6 Duramax pickups are a multi-layer steel style gasket. I bought my Chevy Duramax and the power was a little better and fuel mileage was to. Symptoms of a Bad or Failing ECM-Power Relay.


Use scan tool to isolate one cylinder at a time; Use cap off tool 9864 to block off one injector at a time. This is one of the rare cases where replacing the ECM isn't a waste of money. Does not look to be in the best shape haha Is there anyone in the western WA area that can let me borrow their ECU for 20 min to see if a known working one solves the problem??. What other symptoms are there? I never tested one per say, just hit the local U-Pull it and grabbed a used one to replace it whenever I thought that was the problem, not that expensive.


5-’05 LLY’s are starting to show their age. You should be careful about bad MAF sensor symptoms because a little malfunction in this device leads to poor engine performance. Another symptom of a bad or failing ECU is erratic engine behavior. A faulty computer may cause the vehicle to intermittently have issues such as stalling or misfires. The symptoms may come and go, and may not appear to have any sort of pattern to their frequency or severity.. Bad ECM symptoms includes a sudden shift in gears during automatic transmission.


Duramax Diesel Fuel Systems: Electronic Components Since 1994, GM diesel engines have used electronic engine controls to monitor and provide more precise diesel fuel injection. Both upper and lower case will need to come off. Symptoms of a P0087 DTC may include:. My 2005 Chevy 2500 HD won't start. Thanks for the recalibration for my 2002 Chevy Duramax ECM.


) Check for an intermittent ground wire between connector and sensor. Other than this, there are occasional mechanical failures that can often be associated with any engine design. Driving on a bad thermostat like this allows the computer to run the engine on a fuel map that is too rich. Find patient medical information for Duramax Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.


• You may need to drill into the plastic grill support if the holes do not line up on your application. MIL (Malfunction Indicator Lamp). A bad dual-mass flywheel will cause the engine to shake and feel like a miss. If it isn't, the engine won't generate a signal to the electronic control unit. The ECU doesn't have a "safe mode. I removed the ECU and opened it up and it looks clean but of course that doesn't mean it has not failed.


A bad dual-mass flywheel will cause the engine to shake and feel like a miss. My 2005 Chevy 2500 HD won't start. Learn what does P2610 ECM/PCM Internal Engine Off Timer Performance means, location and how to repair? The Engine Control Module (ECM) / Powertrain Control Module (PCM) contains a timer and measures time between an ignition switch OFF and the next ignition. I'm running both an ECM and a TCM in our project truck that was obtained from a nationally operated salvage center. You can send your existing ECM to KD or buy a "core" ECM either on the salvage market or through KD to have programmed.


Our engine control modules are inspected, tested, and guaranteed. 6L Duramax Diesel. *Strictly speaking: ECU = electronic control unit / any of the following, ECM = engine control module, PCM = powertrain control module (controls both engine and trans), TCM = transmission control module. 6L Duramax diesel engine is a powerful and reliable engine used in Chevy and GMC products. Yesterday it was hard to start and runs horrible then dies. First step: Take off all the A9L’s clothes. I have a 96 and have, myself, experienced a failed ECM and BOY is it hard to diagnose. After all, you didn't buy the truck to race it.


I had issues with my idol at a stop light where the truck wanted to die but would not come to that. P0606 PCM / ECM Processor Fault OBD-II DTC Technical Description. How the code P0101 is set. PLEASE NOTE OUR ECM UPGRADE DOES NOT REQUIRE A SEPARATE BOOST GADGET LIKE SOME OTHERS DO TO RAISE BOOST. Most ECM problems are with the 95-97 cars. I just put two new batteries in it and had the alternator tested.


There are a number of reasons why a crankshaft position sensor can fail, and a number of symptoms associated with that failure. *LIFETIME WARRANTY *Free return shipping *Fast turnaround time. Symptoms of a P0087 DTC may include:. 6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. I'd run the truck without any performance modules for a period of time to verify that the problem doesn't return. If there is any sort of an air leak anywhere between the tank and the IP, it will suck air and not pull fuel from the tank.


The truck wont go over 15mph. Bad EGR valve symptoms vary and resemble problems in other engine systems. From what I have read the rough running with the CEL failure/flickering and no codes, typically indicates a bad ECU. Duramax Performance Parts and Accessories Diesel Power Products has the parts for your GMC or Chevy Truck General Motors made some HUGE waves in the diesel market in 2001 with the release of the first Duramax powered Chevrolet and GMC's. GM joined forces with Isuzu in 2001 to release the first 6. If any confusion, we can work with you via email. Phone: 214-616-7858 shannon@ficmfixer.


There are many symptoms that can be associated with a faulty ECU. If you continue to drive your vehicle with a bad or faulty computer then you risk damaging other electrical parts, which will lead to unnecessary repair costs. Below are the top 5 symptoms of a bad engine control unit in a vehicle. I am trying to diagnose a problem with my truck and figured this would be a helpful way. Since its introduction, the Duramax has gone through LBZ, LLY, LBZ, LMM, and LML designations, with a number of revisions along the way. Five signs and symptoms of a failing or bad engine control module (ECM) RJ Frometa April 24, 2018 Entertainment News 1 Comment 9,462 Views The engine control module (ECM) plays an important role in all modern vehicles. Find out why diesel fuel injectors fail and how to avoid it as we see if the injectors are the problem.


However, instead of using bursts of high pressure or lube oil pressure, the Isuzu/Bosch team decided to jack the fuel pressure up with a special pump and control the injection with a special module, high voltage and. Immobilizer not adapted Engine Control Module (ECM) modified. If there is any sort of an air leak anywhere between the tank and the IP, it will suck air and not pull fuel from the tank. With failure in the sensors and communication between the module and the engine, the vehicle would end up jerking. Here are some of the bad distributor cap symptoms you must know.


On a lly if u can not get any gauges on the insturment panel to work wiggle the blue wire connected to the ecm. What a Faulty PCM and BCM Can Cause DanielJaegerFilms. 4 This vehicle sets a p0606 p060A along with multiple throttle actuator codes and stalls nearly every time it was put into gear. 6L DURAMAX Engine Control Modules (ECM) for sale right now. Ill post the VAG-COM results soon, but I have all injectors, the EVAP purge, and secondary air pump faulting to ground. 41=CKP sensor bad 77 misc.


Thanks for the recalibration for my 2002 Chevy Duramax ECM. You may have to register before you can post: click the register link above to proceed. This is a known problem with the LB7 and GM extended the warranty on these injectors to 7 yrs/200,000 miles. Symptoms of bad maf sensor? 06 duramax. When the CPS goes bad, the computer thinks there is a problem and basically shuts the truck off. Symptoms of a Bad or Failing ECM-Power Relay. I had issues with my idol at a stop light where the truck wanted to die but would not come to that. mine started with the over-heat problem all of a sudden.


7L, VIN G, option LS1, Throttle Cont Programming Included!. It's used to regulate many systems and subsystems in your car's engine, drive train and. It is advisable to clean the injectors every 25,000 to 30,000 miles to ensure that they do not get. The symptoms of a bad fuel pressure regulator include poor fuel economy, difficulty starting the engine, fuel in the vacuum lines and possible engine misfires. Wouldn't restarts so put on the code reader and a thermostate temp code showed. Find patient medical information for Duramax Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. A bad relay may. how would his not be affected? his car is at a shop where they want $1200.


Of course, there are many possible reasons for why this warning light would illuminate. To do this test, turn off your rig. The smoke problem occurs regardless of the edge being turned on or off. Yelling Noises. I would have started with checking power supply voltage and stability, powers & grounds, and start resistance testing the ECM pins per FSM. This is because the engine check light normally illuminates when the computer notices an issue with one of its sensors or circuits. he never received the notice and now called nissan and they said his car wasn't effected. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation.


Welcome to www,autocomputerperformance. Knowing the symptoms of a defective throttle position sensor can help you quickly diagnose the problem and make needed corrections. The easiest symptom to recognize is when the “Check Engine” warning light illuminates on the dashboard. Customer Replaced ECM Now A No Start, No Lights, NO NOTHIN! Ford Focus & Fiesta Powershift Dual Clutch TCM Failure Symptoms. Reinstall both cables to battery. 6L LLY Duramax Injectors Over time, LLY Duramax injectors can become worn and start to work less efficiently due to nozzle seat micro finish imperfections, nozzle hole erosion, coking volume deficiencies, clogging and contaminants. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them.


At this point I think it is a bad ECM, but after reading this thread, Im second guessing myself. We can save you the time and money by testing your ECU DME before spending on costly diagnostic labor and sensors. There are a few things that can tip you off that there's a problem. The last thing you want is to get stuck in the middle of the road. I believe it needs an ECU. However, there are clues drivers can watch out for to determine if their ECM may be going bad. This was the most major failure that put a bad taste of Duramax into owners’ mouths.


Best Answer: Symptoms of a bad engine ground in any car are flaky operation of the entire electrical system. Here is one of the cans, close up:. 6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. The fuel level sensor is a simple float device which returns an electronic signal with the fuel level to the Engine Control Module (ECM). I have replaced the battery and cable ends and left the battery disconnected for 30 minutes hoping the ECM might reset itself, but that would just be too inexpensive and easy. Duramax Performance Parts and Accessories Diesel Power Products has the parts for your GMC or Chevy Truck General Motors made some HUGE waves in the diesel market in 2001 with the release of the first Duramax powered Chevrolet and GMC's. Welcome to www,autocomputerperformance.


burg power can replace batt. One of the best features of the KD tunes is that the ECM can be programmed with two tunes at the same time. These range from emissions problems to faulty O2 sensors to problems with the ECM. hello, i haven't had a chance to check this out myself yet, but my son was told his ECM is bad on his 2000 Sentra. Sometimes, engine heat "overcooks" the MAP sensor's electronics or cracks vacuum lines. If you continue to drive your vehicle with a bad or faulty computer then you risk damaging other electrical parts, which will lead to unnecessary repair costs. Use scan tool to isolate one cylinder at a time; Use cap off tool 9864 to block off one injector at a time. At this point I think it is a bad ECM, but after reading this thread, Im second guessing myself.


PLEASE NOTE OUR ECM UPGRADE DOES NOT REQUIRE A SEPARATE BOOST GADGET LIKE SOME OTHERS DO TO RAISE BOOST. ECM vs PCM: What's the Difference? (Updated) Whether you're looking to tune your car or you want to understand why your car isn't running right, you'll have to learn about on-board computers. Find patient medical information for Duramax Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. This is a known problem with the LB7 and GM extended the warranty on these injectors to 7 yrs/200,000 miles. is the world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units.


Bad ECM symptoms includes a sudden shift in gears during automatic transmission. This can happen when there are problems with the sensed or controlled circuits connected to the ECM. Duramax LMM ECM problems If this is your first visit, be sure to check out the FAQ by clicking the link above. 2006-07 Duramax equipped vehicles, LBZ VIN code D (8th digit is "D"). Duramax Injector Failures-Cause and Prevention LB7: Many LB7 owners have had injector issues.


Phone: 214-616-7858 shannon@ficmfixer. The ECM board was showing communication with the motor control. Find out why diesel fuel injectors fail and how to avoid it as we see if the injectors are the problem. by Ed Ruelas on. The ECU regulates virtually every important system and function in your vehicle.


Duramax Performance Parts and Accessories Diesel Power Products has the parts for your GMC or Chevy Truck General Motors made some HUGE waves in the diesel market in 2001 with the release of the first Duramax powered Chevrolet and GMC's. So that means the injectors are shorted to ground, and I doubt all 4 signal wires are grounded outside the ECU. Below is a helpful guide to determine if you have a faulty ECU. The Power Performance AutoCal supports 2001-2010 Duramax. There are many reasons why you could have an faulty ECU.


After all, you didn't buy the truck to race it. but those are a few. When I got there, the unit had been off and the motor spun freely. When an engine control module fails, it may or may not set any Diagnostic Trouble Codes (DTCs). There are some makes or models of cars that have a reputation for blowing head gaskets. 5-2005 (LLY) Discuss the second generation (2004. Another symptom of a bad or failing ECU is erratic engine behavior. A faulty computer may cause the vehicle to intermittently have issues such as stalling or misfires. The symptoms may come and go, and may not appear to have any sort of pattern to their frequency or severity..


This is a known problem with the LB7 and GM extended the warranty on these injectors to 7 yrs/200,000 miles. The terms ECM and PCM are often used interchangeably when referring to engine electronics, but there is a difference. The driver can then switch between the two on the fly. In order to help avoid accidental air bag deployment and personal injury, whenever. The smoke problem occurs regardless of the edge being turned on or off. 8L, VIN K, option L36, Throttle Cont.


With failure in the sensors and communication between the module and the engine, the vehicle would end up jerking. and reactions must be immediate. Most likely the only symptom of a P0606 DTC code is the illumination of the "Check Engine Light" a. You bought it to commute or tow something. 6L Duramax: LMM Diesel Engine Introduction i-2 Welcome to 6.


3L V6 ENGINE TURNS OVER BUT WILL NOT START - Chevrolet 2005 Silverado 1500 2WD question Search Fixya Press enter to search. A bad jump start can also blow out 2 fuses located between the firewall and ECM. i changed my computer today and every thing went back to normal. when i look up the recall it says like 576,000 cars. 6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. MAP sensors fail by getting clogged, contaminated, or damaged. The engine control module (ECM) controls the fuel pump pressures by using two fuel pressure regulators, fuel pressure regulator 1 is located on top of the fuel injection pump and fuel pressure regulator 2 (7) is located on a fuel rail (2).


Main thing is you got to test evreything and leave the ECM as the last option. 6L Duramax: LMM Diesel Engine Introduction i-2 Welcome to 6. Yelling Noises. Truck of my dreams became a nightmare! I custom ordered a $64,000 2011 Chevy 3500 HD crew cab LTZ loaded with a Duramax. Symptoms of a Bad or Failing Engine Control Module (ECM) Common signs of a failing PCM/ECM/ECU include the Check Engine Light coming on, engine performance issues, and the car not starting.


A bad jump start can also blow out 2 fuses located between the firewall and ECM. Chevrolet/GMC Duramax Diesel Supplement (GMNA Localizing-U. For sale is a used 12588335 12606126 Duramax ECM. Duramax LB7 injectors are also known to develop external leaks.


SIA Electronics has many other repairs available. SYMPTOMS OF A BAD ECM IN 2005 CHEVY SILVERADO 4. Basically, this trouble code sets if the ECM cannot make the engine idle at a set (desired) speed by control of the IAC valve's position. Symptoms of a bad or failing camshaft position sensor autoblog the camshaft position sensor gathers information about the vehicle's camshaft speed and sends it to the vehicle's engine control module ecm. 2001-2004 LB7 Duramax Fuel Injection Control Module #BOS0281010014 performance replacement part sending signals to the fuel injector to release the right amount of fuel saving you money available for sale online. 06V/cell is a huge difference in NiMH state of charge, as much as 50%. The Colony, TX 75056.


If you think your sensor has failed, here are some common symptoms of a bad crankshaft sensor that can help you in. there are different signs for different problems. SOURCE: CHEVY SILVERADO 2500HD DURAMAX DIESEL. Bad ECU Symptoms. Symptoms of a Bad or Failing ECM-Power Relay If there is no power when the key is inserted, the engine will not start, or the battery is dead, you may need to replace the ECM power relay. someone said it was likely the pcm but any ideas would.


6L Duramax EGR manifold. he never received the notice and now called nissan and they said his car wasn't effected. We figured there was a problem, but had no idea just how bad it really was. The easiest symptom to recognize is when the “Check Engine” warning light illuminates on the dashboard. I have access to an ECM, PCM, BCM and TCM from a 2007 Sierra that I can try swapping over modules to help troubleshoot the problem if they are compatible.


If the sensor fails in the cold mode the ecm thinks the engine is warmer than it is and leans out the system It will run like crap hot or cold because even thow the mil light is not on the ecm is in open loop also the tbi injectors are known to go bad. If you are in a boating area, some yards will bring a fuel polisher (basically a fuel pump, water separator, and a couple of filters plumbed together) to your boat to do the cleaning for you. Symptoms of Bad LH2. You'd be better off starting a new thread with your symptoms if you're having an issue. This is then compared to the calculated target fuel pressure as determined by the ECM. The easiest symptom to recognize is when the "Check Engine" warning light illuminates on the dashboard. Fortunately, there are certain symptoms that you can look out for early on to detect if your engine control unit is going bad.


Other GM ECM's available. Bad mass air flow sensor symptoms vw duramax (I believe he said his Duramax decision tree pointed to low pressure fuel side hills where others including heavily loaded old VW Van passed me. This 2002 LB7 Duramax has been a long time coming! More » The 2019 GMC Sierra Will Have a Carbon Fiber Bed This 1971 GMC C10 is BAD. What all goes out if your ecm goes bad on your duramax? - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. Learn what does P2610 ECM/PCM Internal Engine Off Timer Performance means, location and how to repair? The Engine Control Module (ECM) / Powertrain Control Module (PCM) contains a timer and measures time between an ignition switch OFF and the next ignition. A mechanical problem that a technician fails to recognize (or recognizes but fails to fix properly) is often blamed on the ECM. 1 EGR and VGT Electronics Mounting • Mount as shown behind grill so electronics get proper amount of cooling. PLEASE NOTE OUR ECM UPGRADE DOES NOT REQUIRE A SEPARATE BOOST GADGET LIKE SOME OTHERS DO TO RAISE BOOST.


How to Tell If Your Duramax Diesel Turbo Is Gone? by Richard Rowe Introduced in 2001 as a joint venture between GM and Isuzu, the Duramax V-8 was the General's bid to one-up Ford and Chrysler's newest generation of powerful and efficient diesels. ) Poor ECM to engine block ground. However, some drivers can’t even notice the problem until the fuel filter becomes so choked up that the car won’t even start. Re: the battery in my duramax is draining while its off « Reply #6 on: October 09, 2011, 10:15:38 PM » ck for alt charging, ck amp draw, ck battery connections are probably side post terminals make no corrosion on terminals, gm can be very tempermental about corrosion on terminals. Our engine control modules are inspected, tested, and guaranteed. Quality ECM, ECU, EBCM, IDM, FICM repair, rebulider for all makers. /Canada- Black plate (2,1) 7132827) - 2015 - crc - 6/5/14 ii Introduction The names, logos, emblems, slogans, vehicle model names, and vehicle body designs appearing in this manual including, but not limited to, GM, the GM logo, CHEVROLET, GMC, the CHEVROLETand GMC Truck Emblems. My Edge is not supposed to give added fuel at low boost anyway.


2 ECU 561 ECU Workaround Buying a Used ECU Buying a Remanufactured ECU 760T Engine Stops Dead at 60MPH; Bad Power Stage Module 700/900 ECU/AMM Reference Chart Abbreviations: AMM Air Mass Meter. Duramax Problems Common Problems with the 6. I had a carrier last month with the exact same symptoms. For any other specific tunes, please specify in the stated area when placing your order. Anyone have an ECU or ECM unit replaced (located on passenger side)? Could you tell me what are the car symtoms if it had a bad ECU unit? My 96 GLE altima had various electrical problems, including none working radio, AC, headlight and on and off speedometer prior. Note, B-grade is cosmetically flawed and may have a cracked or chipped receptacle that will not affect durability or function. Before you go the mechanic, try Diesel Extreme. It turns out the DC low range setting on my meter is bad, (I got 2.


The motor windings all ohmed the same. Other GM ECM's available. I did the head gaskets on my 01 last fall and it wasn't that bad, just LOTS of parts to take off and keep track of and lots of time. 2011 Duramax - crank no start. See what causes these high pressure injectors to fail in this month's issue of Diesel Power.


Customer Replaced ECM Now A No Start, No Lights, NO NOTHIN! Ford Focus & Fiesta Powershift Dual Clutch TCM Failure Symptoms. You'd be better off starting a new thread with your symptoms if you're having an issue. 7 Symptoms of a Bad Transmission Control Module (and Replacement Cost) Last Updated February 21, 2019 by autotechnician The transmission control module (TCM) is a vital component of any vehicle with an automatic transmission system. 6L Duramax diesel. Change the channel Select Site Singletrack Snow Singletrack Tech Singletrack Charged GritCX. Symptoms of Bad LH2. It is an issue that has an array of different degrees but can leave you stranded on the side of the road if not recognized and dealt with.


See why changing your filters, fluids, and warming your engine up can add to a long service life. Problems with the crankshaft position sensor will often present as problems with engine timing. 5-2005 (LLY) Discuss the second generation (2004. Fuel Injector Driver Module for LLY & LB7 Duramax engines.


2006 LLY engine discussion belongs in Third Generation forum due to the differences of the 2006 LLY and the 2004. Main thing is you got to test evreything and leave the ECM as the last option. Choose from refurbished A-Grade or B-Grade, as well as factory NEW. 5-2005 LLY) of the 6. In the last six months, it has started overcharging. The Power Performance AutoCal supports 2001-2010 Duramax. If you are in a boating area, some yards will bring a fuel polisher (basically a fuel pump, water separator, and a couple of filters plumbed together) to your boat to do the cleaning for you. Knowing the symptoms of a defective throttle position sensor can help you quickly diagnose the problem and make needed corrections.


A duramax doesn't have an electric fuel pump. We can save you the time and money by testing your ECU DME before spending on costly diagnostic labor and sensors. Symptoms of Bad LH2. If your car. It was 30s cold yesterday, truck had no problem starting, went out today, 72 degrees, and it started up fine, then after 5-10 seconds of idel it died. 6 Duramax Common Issues, Problems, and Fixes GMC and Chevy Duramax LB7 6. One such vehicle has such a bad reputation for head gasket problems there is a group of owners trying to get the manufacturer to have a recall on them. The symptoms of a bad fuel pressure regulator include poor fuel economy, difficulty starting the engine, fuel in the vacuum lines and possible engine misfires.


Repair & Return. What are the symptoms of a bad ecm? One day my truck would run great up to about 45mph the crap out on me, shake and rattle then die. The IAC valve position is referred to as IAC counts. As an example, an idling Duramax will flow approximately 37 g/sec of mass air with the EGR off. This ECM was used in 2006-07 LBZ Duramax trucks and LLY vans. Use scan tool to isolate one cylinder at a time; Use cap off tool 9864 to block off one injector at a time. It's not that bad of a job if your competent with tools and have lots of patience.


(Instrument Panel Computer). The biggest problem was the injector flaws from the LB7. 5-’05 LLY’s are starting to show their age. " The repeated click sounds like a bad ECU, but his 3500rpm problem sounds like a bad boost leak. 1 EGR and VGT Electronics Mounting • Mount as shown behind grill so electronics get proper amount of cooling.


First step: Take off all the A9L’s clothes. Duramax Problems Common Problems with the 6. Suggestions: Remove criteria to broaden your results. It's used to regulate many systems and subsystems in your car's engine, drive train and. 6L Duramax: LMM Diesel Engine Course Goal Upon successful completion of this course, you will be able to apply concepts and procedures to diagnose and service concerns on the 6. The Power Performance AutoCal supports 2001-2010 Duramax.


6L Duramax Diesel. Duramax FICM. 2 ECU 561 ECU Workaround Buying a Used ECU Buying a Remanufactured ECU 760T Engine Stops Dead at 60MPH; Bad Power Stage Module 700/900 ECU/AMM Reference Chart Abbreviations: AMM Air Mass Meter. The smoke problem occurs regardless of the edge being turned on or off.


I have access to an ECM, PCM, BCM and TCM from a 2007 Sierra that I can try swapping over modules to help troubleshoot the problem if they are compatible. 5-2005 LLY Duramax FICM - Fuel Injection Control Module. The Colony, TX 75056. If you dont want to replace your ECM make sure you follow these 3 tips to keep your truck running after you tune it. It is advisable to clean the injectors every 25,000 to 30,000 miles to ensure that they do not get. Five signs and symptoms of a failing or bad engine control module (ECM) RJ Frometa April 24, 2018 Entertainment News 1 Comment 9,462 Views The engine control module (ECM) plays an important role in all modern vehicles. Suite 600-360. What are the symptoms of a bad ecm? One day my truck would run great up to about 45mph the crap out on me, shake and rattle then die.


6L Duramax diesel engine is a powerful and reliable engine used in Chevy and GMC products. hello, i haven't had a chance to check this out myself yet, but my son was told his ECM is bad on his 2000 Sentra. It's used to regulate many systems and subsystems in your car's engine, drive train and other major components. Once you drive it a while on the factory tune you get use to it. 4 ECU ECU Fuel Pump Control Circuit Repair Repairing Your Own LH 2. The electronic control module in a Ford cannot diagnose itself, so it gives you other signs to let you know that it is bad.


The ecm doesn't adjust the rail pressure until it sees other parameters from the throttle position switch, map , rpms and others, at that point the ecm will adjust pressure. in ecm if u send it to them 724 360 5092 call them they can do batt. Bad ECU Symptoms. I already figured it out, this was a loose PCM ground wire (on the negative battery terminal wire).


The driver can then switch between the two on the fly. There are three capacitors that typically need replaced in an A9L / Fox Body MAF ECM. 7 Symptoms of a Bad Transmission Control Module (and Replacement Cost) Last Updated February 21, 2019 by autotechnician The transmission control module (TCM) is a vital component of any vehicle with an automatic transmission system. 6 LB7 diesel pickup or are looking to buy one, here are some common issues and problems we have run into in our shop. Yelling Noises. Bad Distributor Cap Symptoms.


How the code P0101 is set. How would you know your ECM is failing? Here are the common Symptoms of a Cummins ECU failure you should watch out for. and even when there are symptoms, like loss of oil pessure, it's rarely the pump any way. Let Hot Shot's Secret help you diagnose and solve your excessive white smoke issues with your 6. 7L, VIN G, option LS1, Throttle Cont Programming Included!. The motor windings all ohmed the same. Unfortunately, there are no GMC 6.


We got everything fixed now its time to drive it correct. More » Tobey Dulgar's. The smoke problem occurs regardless of the edge being turned on or off. Symptoms Of Bad Oil Pressure Switch Can anyone tell me what the symptoms of a bad oil pressure switch (sending unit)? I believe my car may have a bad one, but I want to be sure before I replace something that doesn’t need replaced. You will find it dirty, greased build-up and full of pollutants. It had a slight miss on acceleration, but once the engine warmed up it seemed to run fine. GM joined forces with Isuzu in 2001 to release the first 6.


Welcome to www,autocomputerperformance. PLEASE NOTE OUR ECM UPGRADE DOES NOT REQUIRE A SEPARATE BOOST GADGET LIKE SOME OTHERS DO TO RAISE BOOST. ) Poor ECM to engine block ground. In all likelyhood the PCM / ECM has failed. If the MAP sensor goes bad, the ECM can’t accurately calculate engine load, which means the air-fuel ratio will become either too rich (more fuel) or too lean (less fuel). I don't remember if the late 80's ECM's used the EPROM or not, but you want to avoid having to swap that EPROM if you have to.


If you have a bad engine control unit in your vehicle, the symptoms will become more than obvious. Symptoms of a Bad or Failing Engine Control Module in Your Car The engine control module (ECM), also commonly referred to as the engine control unit (ECU) or powertrain control module (PCM), is one of the most important components found on virtually all modern vehicles. 6L Duramax EGR manifold. Customer Replaced ECM Now A No Start, No Lights, NO NOTHIN! Ford Focus & Fiesta Powershift Dual Clutch TCM Failure Symptoms. At this point I think it is a bad ECM, but after reading this thread, Im second guessing myself. 4 ECU ECU Fuel Pump Control Circuit Repair Repairing Your Own LH 2.


It's used to regulate many systems and subsystems in your car's engine, drive train and other major components. The ECM will now receive the correct reading, and, after a certain amount of time, it will extinguish the light, and delete the code. So, when the check engine light comes on, this should be a clear indication that your ECM has a problem. Put the old TCM in the truck and headed home. The truck, a 2004 Chevy with a fueled and hot LB7 Duramax engine, was a little harder to start than usual.


It helps regulate the systems and sub-systems imperative to the operation of your vehicle, so when it goes wrong it can cause a host of problems. Duramax Second Generation: 2004. MIL (Malfunction Indicator Lamp). 7L, VIN G, option LS1, Throttle Cont Programming Included!. 4 ECU ECU Failure Modes Intermittent Stalling; Bad LH 2. The gaskets in all years of 6. The Top 5 Symptoms of a Bad Car Engine ECU. If the TPS bad spot is fairly large, the light may stay on for a while.


Diesel ECM Computers customer-centric auto computer re-manufacturing & rebuilding company. SOURCE: CHEVY SILVERADO 2500HD DURAMAX DIESEL. How Do You Test for a Bad ECM? Testing for a bad electronic control module (ECM), sometimes called an electronic control unit, requires the use of computer diagnostic equipment. The IAC valve position is referred to as IAC counts. The LML Duramax power was an impressive 397 HP @ 3000 RPM and 765 lb ft @ 1600 RPM. I was told for the computer and having it installed by nissan would run me 1100.


Duramax Bad Ecm Symptoms