Lb7 bad ficm symptoms

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Web14 dec. 2012 · Joined Apr 1, 2012. 61 Posts. #3 · Nov 17, 2012. You need to turn the pressure of the lift pump down to like 9 PSI on an LB7 or it will cause the FICM to become confused and start loping at idle. 2001 GMC Sierra CC-DRW. Web10 okt. 2024 · I would pull your glow plugs and make certain you haven't blown a tip off of a glow plug as even a cold glow plug can break when starting fluid ignites, and then you …

What are the symptoms of a failing F.I.C.M? - Chevy and GMC …

Web5 nov. 2024 · One of the most common LB7 Duramax problems is leaking O-rings on the Fuel Filter Housing. As these trucks continue to get older, the original o-rings can … WebWhen I installed the injectors I used all new fuel lines, orings, and new banjo seals.These bad FICM symptoms are often accompanied by codes P0611, P1378 and possibly all (8 ... FICM voltages are LB7-96v, LLY-48v, LBZ-24v. Injector Operation LB7/LLY ( prior to 2006) The FICM uses two drivers to contol each injector.The High Side Driver (HSD ... the home depot distribution center locations

Bad ECM symptoms Chevy and GMC Duramax Diesel Forum

Web5 aug. 2024 · LB7 Faulty Fuel Filter Housing Symptoms. Fuel pump loses prime making the engine hard start; Low fuel rail engine codes; Engine misfires, shaky idling, performance issues; Your two replacement options … WebA low voltage ficm can cause less than perfect combustion within the engine. This can lead to poor performance and poor fuel economy. You can encounter hard starts and slow … Web22 aug. 2024 · I have a 2004 lb7 that I put injectors in a while ago and I have a miss that happens when the engine is idling while transmission is in gear and truck is creeping about walking speed. It does it hot or cold. It doesn't do it in neutral or drive while not moving. … the home depot edging

Signs & Symptoms Of Bad FICM Relay (Explained)

WebGM 97720663 LB7 (FICM) Fuel Injection Control Module . This is a new Genuine GM LB7 Bosch Fuel Injection Control Module unit or FICM as it is commonly referred to. This unit will work on all 2001-2004 LB7 Duramax … Web27 aug. 2015 · 15. 18. Danbury, TX. Aug 26, 2015. #6. Just because the boots are all attached does not mean that there is not a hole in the bottom of one where you cannot see it. You might also look at the intercooler steel pipes. If its in rough shape, one of them could have a hole in it causing the lack of boost. the home depot distributionWeb29 mrt. 2024 · The example below shows a 2002 LB7 engine cranking over with the ignition relay unplugged. Note that the fuel rail pressure is at 24,053 psi. As stated previously, … the home depot dishwasher

"Web29 mrt. 2024 · If the fuel supply side is okay, but the cranking pressure is low and the hand primer is stiff, the following list shows the more likely causes. • Leaking fuel pressure relief valve • Leaking... " - Lb7 bad ficm symptoms

Lb7 bad ficm symptoms

GM 97720663 LB7 (FICM) Fuel Injection Control …

Web7 sep. 2015 · When an LB7 injector fails, it can dump an enormous amount of excess fuel into the engine, often at very low speeds (such as idle, for example). When this happens, the extra fuel isn't burned; it...

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Web7 jan. 2024 · It would increase to 48 within a couple miles. Once warm it runs at 48 and sometimes moves around between 47 to 48.5, which I think is normal? My question is … Web25 dec. 2013 · Jan 10, 2012. #3. Log the actual frp, desired frp and if you want difference between desired and actual, while at idle both in park and drive. Watch for spikes in actual rail pressure that are higher than desired. If its dancing around that's your surging idle. Then GM s manual will tell you to command rail pressure in steps up to 160mpa and ...

Web1 dec. 2024 · Power Stroke 6.0L FUEL INJECTION CONTROL MODULE – FICM – COMPLETE: 4C3Z-12B599-ABRM. The FICM drives the fuel injector solenoids based on fuel and timing commands (via *CAN2 link) from the PCM. It uses engine speed and position signals (*CKPO, *CMPO) to determine when the injectors need to be activated. WebA failing FICM can cause all sorts of problems, but one of the most common symptoms is an engine that is hard to get started, especially when the engine is cold or has sat …

Web10 okt. 2024 · Any less and there isn't enough differential pressure for them to open. 1st off make sure you have a GOOD supply of air free fuel to the cp3. 2nd is throw your starting fluid away, NEVER take it to your engine again, AND PRAY TO GOD you haven't SCREWED your engine up. YES, just a wiff of it can DESTROY your LB7. Web20 nov. 2024 · According to service information, the correct diagnostic procedure is to use a professional volt/ohmmeter to measure the resistance of each fuel injector circuit. The specified resistance at room temperature is between 0.3 to 0.4 ohms. Before measuring the resistance of any circuit, remove the negative cable on each battery.

Web5 nov. 2024 · Signs of Bad LB7 Duramax Injectors Here are common issues experienced when you have bad injectors. Excessive/Constant Smoke when Idling Hard Starts Fuel in Oil. Check Dipstick look for a surplus of oil or even smell the dipstick. When fuel is present, you can often smell it. How To Fix Bad Injectors

Web8 apr. 2015 · The grounds for both plugs are tied together internally inside the FICM which would explain why it was running ok with this ground missing. I also checked the wiring … the home depot dogsWeb24 nov. 2024 · Performance Roadblocks of the LLY Duramax. 1. Snapped Crankshaft. Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. the home depot east greenbush nyWeb13 apr. 2012 · The communication Style is different. If you use an lb7 FICM in an 05 truck it will not work. If you use an lb7 FICM on an LLY engine in an 01-02 LB7 truck it will work. The LLY FICM will not work on an LLY in an 01-02 Lb7 truck, using the Lb7 controls. The inlet/outlet ports are in different areas as well. The pinout is identicle on both units. the home depot eloy cavazosWeb29 jun. 2015 · When the FICM detects incorrect current on an injector circuit, it will shut down all injectors on that bank and give the codes that you have. Any one simple problem will cause a whole bank to be shut down. You should do continuity and shorts checks on each individual injector circuit while you have the FICM plugs off. the home depot electric fireplacesWeb4 nov. 2011 · Discussion Starter · #3 · Nov 3, 2011. There is nothing that says FICM, only like ENG2 and ENG1 and stuff. any body else know what it might be? 2003 2500HD LT, CCSB, LB7, EFI tuned by IdahoRob and installed by GOS Performance, Edge CS Insight, AFE intake, 5" center dump exhaust, 8" MBRP tip, 6" Pro-Comp lift, Fox dual resevoirs … the home depot dryerWeb9 aug. 2024 · A_T_Ver. Registered. Joined Apr 5, 2008. 124 Posts. Discussion Starter · #1 · Sep 3, 2010. 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. Codes are p0642 and p0802. Yesterday it was hard to start and runs horrible then dies. the home depot el cajon caWeb31 mei 2013 · The FICM monitors the status of the ignition voltage circuits and the fuel injector command circuits. When a fuel injector circuit condition is detected by the … the home depot electrical