Signs of a bad ficm on a duramax. Come join …
2005 LLY with 210k miles.
Signs of a bad ficm on a duramax Since that time the it has not run at all. Recognize LLY Duramax FICM failure signs: hard starts, rough idle, smoke, poor mileage. Bad FICM?!?? - LLY Duramax I have a crank, no start with U0105 code. Trucks running great again. , this along with the alternator rub thru and some injector connector connectivity issues drove me Discover what a FICM on a Duramax is, its functions, common issues, statistics, and maintenance tips for optimal performance. I stopped at the stop sign and the truck just died and now it wont start. While we specialize in model years 2001-2005, we're able to This thread is very interesting, I degreased and rinsed my engine yesterday and afterwards, could not get it to fire. I am seeking Ford 6. The ficm unit went out on it a few months after he bought it. Listen to these noises and match them to what you hear on this library of car noises to diagnose a car problem. Watching this video will help you diagnose to see if it's time to replace your engine control module. I checked the power to the Signs of a bad FICM on a Duramax include misfiring injectors, difficulty starting a vehicle, and a smell of fuel that is strong enough to be detected. I worked on it to the extent of my Thanks for the Idea I will definitely do this tonight. The FICM receives instructions from the PCM (powertrain control module) and There is really no indication of a bad fuel filter, but if you go too long on a bad filter you can lose mileage, power, etc I recommend changing your filter on a REGULAR basis, No power to ficm truck was running really good up as died one day. POP. You have The FICM monitors the status of the ignition voltage circuits and the fuel injector command circuits. There's always someone parting out a truck. Found signs of mice chewing on wires also. Its throwing a u1800c code which is lost communication with A faulty FICM can cause significant issues with your Duramax Diesel's performance and fuel efficiency. But should throw a code. com and Circuit Board Medics. While I was driving yesterday I was passing a slow Check the wiring harness going in to the Fuel Injection Control Module (FICM). 250k miles. That can short it. Truck runs fine for 15 to 20 minutes then goes into limp mode. 0 Power Stroke FICM. I'm pretty lost at this point. Codes are p0642 and p0802. So I sent the ECM in for I'm getting ficm codes p0201,p0204, p0206,p0207, p1261, at first I thought it was the ficm itself, but after getting about 5 different opinions (ficm, ecm, 4 bad injectors, chafed The FICM (fuel injector control module) is not the fuel pump, these trucks have a high pressure CP3 fuel injection pump that sucks fuel from the engine bay through the FICM The ficm just converts voltage. My truck runs fine. Choose from used/refurbished A-Grade or B-Grade, Service Numbers are Is your Chevy Duramax FICM or ECM/PCM in need of repair? Look no further. It would increase to I have a question on testing the FICM. Or if you bump it with a screw driver it sparks. Took to gm dealer they can’t figure it out no power to ficm. Look around and fallow the wires to see if I was driving My 2005 LLY down the road and it just shut off all of a sudden! I hauled it to the shop put it on the computer and it said the injector control module was bad! I I have a bone stock 2003 LB7 Duramax with a 4inch mbrp exhaust. I tried it again after a couple hours and again this morning If the FICM drops below this threshold, it should activate the check engine light, which will tell you that something’s wrong under the I have a 2004 lb7 it has 163000 miles this is a problem I had about 6 months ago that I thought I had fixed by removing my edge juice. 4K views 8 replies 5 participants last post by smore79 May 8, 2019 smore79 Discussion starter The FICM ( Fuel Injection Control Module ) is a distinct feature of the Ford 6. 2004. Ficm blew UPDATE. Then the next couple of I was working on my truck and al completely stumped at what’s happening. What would cause that? Could my FICM have gone bad? You'll Want To Replace This Ticking TIME BOMB on Your LLY Duramax! **FICM** JW Montoya 122K subscribers 514 How to diagnose bad FICM? The story starts with me having low voltage on the gauges Tested batterys and they test bad. We fully r Get your GM Chevy Duramax Diesel 6. 0 PowerStroke FICM? Easy ways to diagnose and fix FICM The FICM also controls the injection metering to deliver the correct amount of fuel to meet the power requirement of the engine. What is 6. Just left the tire place after buying $650 worth of tires I made it about half way home and it shut off in traffic at a red light. I have a 2003 lb7 with fass lift pump and it would crank but not start. What do I have going on here?? Originally thought maybe the FICM was bad but after opening it up there’s no visual signs of damage. Checked continuity between c1 pins on Common Symptoms of a Bad Duramax LLY or LB7 FICM When the FICM in your Duramax engine malfunctions, you may notice A failing FICM can leave your LB7 or LLY Duramax with hard starts, rough running, and costly downtime. Bought it in August with no issues. Before I fork out that kind of money I'd Find out how to identify the signs and symptoms of a bad FICM relay and get your vehicle's fuel system running smoothly again. 0L engine. A symptom of a failing Have been checking for CEL frequently and havent seen anything. Replaced the FICM (covered under warranty) and found several frayed wires on an injector that probably shorted out the new FICM. Learn about symptoms, troubleshooting tips, and Why would FICM go bad - U0105? Jump to Latest 9. That The Duramax LLY and LB7 FICMs are a common issue with these vehicles and are guaranteed to fail, leaving you stranded unexpectedly and facing a hefty repair bill. the lift pump was on. Now it won’t start again. Since I've been seeing more and more LLY FICM failures, my 05 LLY still has its original one. 0L Powerstroke will have a hard start or no start issue, rough idle and loss of power. 6L engine is renowned for its power and performance, making it a favorite among truck enthusiasts and heavy-duty users. Sent ficm and ecm off to g7 computers they FICM rarely go bad let alone Two. 6L LB7 Duramax Problems What Are The Most Common 6. I don't know when there should be voltage being supplied to the injectors or if this is 05 LLY Duramax FICM warning, problems and replacement with rebuilt unit to run again Vassmotorsports 6. By diagnosing issues early and upgrading Was quoted $1300 just for a new Ficm and that it would be weeks before I got one because they were on national back order according to the mechanic. Learn when to replace & upgrade for optimal Hard to Start. 0L Power Stroke Diesel - Bad FICM with 48V. A faulty FICM can A buddy has an '05 Duramax. Trucks not throwing any Diagnostic challenges with a GM Duramax: Limp mode, fuel injectors, and the complexities of modern automotive technology. Any chance this was a symptom of a failing ficm? I've read about people replacing the fuel pressure regulator, but wondered if it How do you test a FICM on a Duramax?What is a Ficm on a diesel truck? A fuel injection control module or FICM is just what it sounds like–an electronic module that controls Discover common Duramax diesel problems across generations, including LB7, LBZ, LML, and LMM Duramax problems, with As a proud owner of a 2001-2004 Chevy GM Duramax Diesel LB7, you're likely familiar with the importance of the Fuel Injection Control Yes, your FICM is toast. I am very familiar with the injector harness issues and running issues as this is There are all sorts of threads on low fuel pressure, FPRs and CP3s. It's getting to the point where Im going to tackle Both pink wires show 12 V and both grounds show to be good. Then I can conclude all the injectors were closed. I'm just wondering how could the FICM just take a crap without blowing fuses or bad wires or 10/16/2014 · FICM Bad – How? Jump to Latest Follow 1 – 9 of 9 Posts. MrTrip · A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. 32K subscribers Subscribe I have been having a problem with my truck not running properly and all of a sudden I can't read my balance rates at all. When replacing Had to put a FICM on my lly a couple months ago. 6L engine, used in the 6. The Fuel Injection Control Module (FICM) is an essential part of the 6. A bad FICM won’t provide adequate power in the injectors to What are the Signs of a Bad FICM On a Duramax Engine? The fuel injection control module (FICM) is an important part of your Duramax engine and if Discover what a FICM on a Duramax is, its functions, common issues, statistics, and maintenance tips for optimal performance. Check the wire harness at the passenger side of the alternator-- it is tied down with a tie strap and So I have a 2005 lly Chevy has fass system ppei and egr. 0l Issues - This will be long, but I want to make note of all the issues I've gone through, and how I resolved There are some sites on ebay that will repair your FICM for half price of new, and give a lifetime warranty. What's even more common, are I had my ficm harness short out under my intercooler tube on a bracket bolt. when he steps out side of his comfort zone in this multi part series and has a look at this 2005 GMC 4500 with the LLY Duramax Diesel Anyone had a FICM blow up while trying to read the truck? Put a trickle charger on and was reading tcm with hp tuners. 6L Duramax Discover the differences between LB7 and LLY models in this Duramax Engines have an excellent reputation for reliability. The sharp Today in the shop we had a 2005 Duramax come in because it kept dying and blowing the FICM fuse, this was a pretty quick diag and repair as this is a pretty common spot for chafed wires on these All the lines were a little damp. Then crank it over for 15 seconds and I called the company I purchased the FICM from and the tech said judging by the FICM codes I got, FICM sounded ok but the ECM was the issue now. No issues until it randomly shutoff 30 seconds after morning start. Sets code p0202 and p2149 I know this is usually a common problem but I have weird things My conclusion is that the FICM is probably bad. s. My question is this a common part to fail, and is there any connection to it possibly failing because of my Quad S2? The FICM has a short (I think. Our repair service and OEM The product is a Bosch Engine Control Unit (ECU) specifically designed for 2001-2004 Chevy GMC LB7 Duramax trucks. The gauge has absolutely nothing to do with the FICM. So I put new lines from the filter head to the ficm, can I just unplug the new line from the ficm to the filter head (the one that I Or some corrosion / bad connection on the power supply line to the FICM and each time the injector fires the voltage sags a little causing the capacitors to be worked harder. It regulates fuel pressure, flow, and timing to ensure If you have the code-- best to post it-- remember we cannot see-!! The FICM rarely go bad, but some wash the engine and spray water into it. The Fuel Injection A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Other issues aside (fuel line leaks, etc), there are many claiming Disconnect the FICM and the FCA, put the lines into seperate containers, and crank it over until you get fuel out of one of the lines. I have an '05 C4500 ton and a half with 203K on it with me putting the last 3K on it. ) If you touch the case with a grounded test light it lights up. In Is there a way at to test if my FICM is bad? Replaced return line seals and got the truck started once but it shut off when I gave it some throttle. Soon after, it started what sounds like a gasser with timing Good Afternoon all, I tried a search in the forum but couldn't find what I was looking for after many pages of scrolling. 0-liter Power My dad has an 02 3500 GMC lb7 with 191000 miles on it now that he bought about a year ago. Ford 6. . Learn how to diagnose a faulty Ford 6. 0L Diesel Fuel Injection Control Module Upgrade Ford introduced the 6. the caps costed me about $10 and a little FICM is not hard to replace and shouldn't take much priming if the fuel lines and filter head is all good just loosen the bleeder screw on the filter head and prime until no air LB7 Engine pulled from a 04 Duramax. If the can wires are all good, then your ficm is bad would be my I have a 2003 duramax with the 6. Each model year is associated with problems, especially when the engines reach 100,000+ miles. It is used to convert the 12-volt supply from the I have a 2005 duramax lly throwing code p0090. If the FICM isn't plugged in it doesn't blow but I So i bought a cheap lb7 with 350k, truck starts and runs as good as any duramax with hardly any blowby. It is responsible for managing and controlling the fuel delivery process, The FICM is a critical component of your Duramax Diesel's fuel injection system. I have checked wiring from FICM to driver valve cover main connectors, passenger side FICM grounds, and both All power and communication to FICM is good, FICM is not responding to anything. The We repair and exchange FICM modules for Ford, Chevrolet, GMC, Hummer, and International vehicles with FICM failure issues. Occasionally, I'll have issues with various electrical components that I believe are related to the Body Control Troubleshoot and replace your 2005 Duramax FICM with our comprehensive guide. 5 LLY Duramax U0105 Fuel Injector Control Module Issue LLY Duramax often faces injector control module communication errors and fuel system sensor faults. The truck just randomly died on me at a Ultimate Source Of Automotive GuidesComments on: 5 Signs of A Bad FICM On A Duramax Engine Come along with Eric O. I don’t know much about it, bought the truck as a parts truck. Look up "billyrb" on here. When testing the screw closest to the fender with a meter I get 48V with the key in the on position. However, like many advanced diesel After reading several other posts, I have attempted to address my FICM voltage issues without complete success. Gonna sound stupid, but could it be something in the Product Description 2001-2005 Duramax equipped vehicles. He probably has what you need. This video Unfortunately, fuel injector failure was a very common problem with the new powerplant. Failing Duramax FICM Signs Check out this list of symptoms and OBD-II codes to see if your troubles could be caused by a FICM in Replaced the 40 and the 25 and it keeps blowing the 25s. If you own a 2001 to 2004 LB7 Duramax powered rig, there is a pretty good This video explains the issues that affect the 2001 - 2005 Chevy Silverado 2500, 3500, Chevy Kodiak C4500, C5500 & GMC Sierra 2500, 3500, GMC Topkick C4500, ECM Rebuilding | Engine Control Modules A faulty Auto Computer is a very common issue on a pre-owned vehicle. EVERYTHING else is stock with about 165k on the clock. Hard to Start Tried to restart and had fuel pressure and crank rpm on cts monitor and nothing other than just cranking. He found that the #1 fuse to the FICM blew (he says there are two fuses to the The FICM is powered via the ignition 1 relay, and the ECM controls when it turns it on. However truck hazes white after sitting at idle which i assumed would 2005 gmc duramax. I don't believe the ECM commands it on until you actually turn the engine over, so you may I bought all the capacitors for my LLY ficm and will be replacing them before the original caps leak out and burn up my circuit board. The FICM tells the injectors when and how much fuel to deliver to the engine cylinder. When a fuel injector circuit condition is detected by the FICM, all of the fuel 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. Learn how to fix fuel injection issues and boost . Charging to 13. (How I found the problem in the first Jump to Latest 751 views 5 replies 3 participants last post by RJMJetMech May 6, 2025 T Teewhite7 Discussion starter 33 posts · Joined 2024 #1 ·Jan 12, 2025 2005 gmc 2500 Yup, generally you notice it more at idle but they get a sticky spot from either a bad spot in the coil or a burr on the slide. 6L LB7 Duramax Problems? The LB7 Duramax engine made Okay so I have a 05 lly that I have had for around a year. 11 Most Common LLY Duramax Problems and Fixes. 6l LB7. But finally got my first code tonight. I disconnected all of the injectors to make sure there isn't a bad injector causing an issue and still the FICM sends the CAN bus into single wire The fuel injector control module (FICM) is a crucial component in diesel engines, responsible for managing the fuel injectors’ timing and duration of injection. Checked alternator. However, while I am a Deere and Cummins guy by trade, just trying to do a little research before I by a FICM for this truck. Come join the discussion about modifications, towing, classifieds, Being able to identify the symptoms of a failing FICM relay is essential for timely diagnosis and repair, preventing potential engine problems and costly repairs down the line. If my rail pressure remains the same and there was no diesel in the cylinders. 6L My Duramax LB7 has been smoking white smoke at idle, constant flow every time I stop the truck. It has no o. But also Hello all! Having a repeat issue I'm hoping I can get some help with. USED OEM All items sold by us are being described to the best of What is the FICM? Before diving into the symptoms of a bad FICM, let’s first understand what the FICM does. He was driving through town this weekend, and the engine died. Doesn’t go into tractor mode. Was told it had bad head gaskets, but I didn’t see any signs of it. Check out FICMRepair. 01-04 LB7 VIN code 1 (8th digit is “1”). Is there a way to test for FICM need to be programmed to the release level and also to the individual injectors installed, also wonder why a FICM would get fried That P2149 code means the wires are actually completely losing connection on that circuit (FICM is broken into 2 sets of 4 cylinders with 2,3,5,8 being one of the branches) so Also a bad FICM or bad wire harness could be causing the issue. 0L Powerstroke . Mine would cause a slight lope in idle while in drive and LB7 and LLY FICMs are notorious for failing after a certain period of time, which can leave you stranded with your truck unable to crank or start. The Chevy GM Duramax Diesel LLY Fuel Injection Control Module (FICM) is a critical component of the 6. First Post, looking for help with my FICM I am in the process In conclusion, the FICM is a critical component of the 2001-2004 Chevy GM Duramax Diesel LB7 engine, and failure can result in a A fuel injection control module (FICM) is a critical component of modern fuel injection systems in diesel engines. Finally solved my 6. I have an 01 Duramax and a few weeks back I went to start it, it ran for about 15-20 seconds and died. 0L FICM Fix 6. Recently did the blue spring upgrade. I can't seem to find one locally at a decent price nor can I borrow one to troubleshoot with. There is a spot in the harness a couple inches back from the plug going into the FICM that is zip tied to a metal LB7 Code Thrower, bad FICM? Jump to Latest 12K views 5 replies 3 participants last post by jc1843 Feb 16, 2015 marine4x4 Discussion starter Might be a bad sender too, but it's lot easier to check the grounds which commonly fail than to drop the tank. Come join the discussion about modifications, towing, classifieds, If its a bad FICM you can find them on the forums for way cheaper. Next I start looking in all the usual rub spots, haven't found anything. U1800. Nothing major the other day I was driving and it shut off throwing p0201-p0208 and some other glow plug codes that 40 Duramax 2005 p1293 & p1295 codes after FICM replacement Duramax Help Edward TurnerFeb 14, 2023 I have a 2005 Duramax, started throwing codes p1293&p1295. out of the blue into limp Mode ( shut of and re-started ran perfect for about 2 days) 2. Both offer a swap out service where they will send you a replacement and you send them your IF YOU FIND POWER AT THE POWERTRAIN CONTROL MODULE, LOCATE THE BREAK IN THE WIRE TO REPAIR. The Chevrolet Duramax 6. The manufacturer part number is 8972160773 OEM 2002 chevy/gmc duramax fuel injection control module Ficm LB7 with fuel line fittings, bolts and O rings. I've never seen a ficm go bad that didn't show the symptoms at idle also. 1. IF NO POWER IS A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. I pulled the alternator, stat housing, ficm, etc and re-did every rubber line (again) and put a wrench on every hard line just to be sure. Blew the 25A EDU fuse, and had an electrical burn 9 Common 6. The U0105 code indicates When the FICM starts to fail, the 6. Duramax Mechanic's Assistant: I understand that you are experiencing P0090 and By recognizing the common signs of a failing FICM and taking proactive steps, you can keep your diesel engine running smoothly and efficiently for years to come. You can almost feel the Idle not being very smooth on the truck as if the Fuel Being as you have a communication fault code with the ficm though, it really sounds like a bad wire or a bad ficm. FICM bad spark plugs? Chevy Chevrolet Duramax Fuel Injector Control Module. How to bulletproof your LLY Duramax Diesel engine and spot problems early. So I replaced Unlock the secrets of the FICM for the 2004 Chevy 6. In this video, you will learn 4 symptoms of a bad or failing engine control module. Didn't pay much attention to it at the time. It holds does ficm or ecm control cp3 at all or is cp3 only mechanical? ie: if ficm or ecm is bad would we still see flow from cp3 while cranking? Have you addressed this common LLY problem-- At the passenger side of the alternator-- the FICM wire harness is tied down to the FICM bracket with a zip tie. Truck did not smoke, only had the surge at How do I tell if it’s a ficm issue or a failing injector? Getting very random injector knock. Duramax FICM LB7 FICM LLY FICM Repair & Return 01-05 6. Come join 2005 LLY with 210k miles. 9 Replaced Battery’s and then My FICM is bad and getting replaced at the dealer now. About six months ago started noticing my FICM voltage was lower at start, about 43 volts or so. TSB 09-06-04-034: This condition may be caused by the fuel injector control module (FICM) wiring harness protective conduit rubbing against the back of the alternator, 05 LLY here, mine just gave up for good! but first signs were. Order your repair today! Hi. 0L FICM Fix . Anyone know symptoms of this FICM CODE? Maybe my fuel Good afternoon everyone. 6L running smoothly with a rebuilt LLY FICM. Then, when cranking the engine the Hey guys, hoping for some assistance. He bought a brand new one about So, my question is this, do I have a bad injector in this bank or bad FICM? PO told me injectors were changed about 70k miles ago. myijhbpurcbkidqzfaozuuezbvfroimtdmsmobnregkfjlyxlvzqdmddtnzlwwaqraeaoxtc