Quick Answer

What does the Ficm do on a LLY Duramax?

The FICM is the Fuel Injector Control Module that sends the signal to the injector to open or close.

Will an lb7 Ficm work on an lly?

you need to change the ECM, FICM and the engine harness along with the glow plug controller harness. you have the have the LLY engine style out of a 4500 and up series as the fuel filters are on different sides.

What is a Ficm on a 6.6 Duramax?

Diesel Injector Driver Module (IDM) or Fuel Injector Control Module (FICM) is manufactured and tested to the strictest OE standards for unparalleled performance. Built for trouble-free ownership and 100% visually inspected and quality tested. -Guaranteed exact fit for easy installation.

Does a Duramax Ficm have to be programmed?

From my research, the FICM does not appear to need programming(but I read this on the internet, soooo..).

How do I know if my LLY Duramax injectors are bad?

There is a multitude of symptoms your truck will experience if the injectors are going bad. One of the first signs we see are excessive smoke/haze. You will notice your truck billowing out a little more smoke than usual or hazing at idle. Another issue you may notice is high EGTs.

How do you remove a Firam from a Duramax?

$1.00 Capacitor Blew Up My Duramax FICM! LLY Duramax …

What is LLY Duramax?

LLY. The LLY (internally called the 8GF1) (engine code “2”) is a 6.6 L
403.9 cu in (6,619 cc) turbocharged engine
which debuted in mid-2004 and continued until the end of 2005. It is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads.

What is the ice pick fix Duramax?

The “Ice Pick” fix— you use an icepick to press on the injector terminal connector through to the terminal. It raises a small dimple inside the terminal to make better contact with the injector terminal.

Does an LMM have a Ficm?

There isn’t one on an lmm. Only on the 01-05s. The ECM on the 06+ trucks control the injectors.

Where are the injectors on a LLY Duramax?

The good news is LLY injectors are located outside the valve covers so the task is considerably easier and cheaper than on prior LB7 models.

What year Duramax has injector problems?

What year Duramax has injector problems? The LB7 Duramax built from 2001 – 2004.5 is known for injector failure. The good news is the replacement injectors you purchase from us incorporate several updates to help prevent repeat failures.

How often do Duramax injectors go bad?

However, early Duramaxes aren’t problem free. The biggest issue with ’01-to-’04 and 1/2 LB7 engines is their fuel injectors’ propensity to fail, typically before an engine reaches 100,000 miles.

Where is the Ficm on a 2005 Duramax?

At the passenger side of the alternator— the FICM wire harness is tied down to the bracket with a zip tie. The sharp corner of the FICM bracket cuts into the wire loom and the wires.

What is the Edu fuse?

EDU fuse is for your FICM (fuel injection control module). Now on the 2500HD model the wires going to this are ty wrapped on the alternator bracket thus are prone to rub threw, although I haven’t heard of the actual fuse going out, just alot of codes and poor running.

How do you test a Firam on a Duramax lb7?


How many miles will a LLY Duramax last?

The Duramax engine should last up to 300,000 miles before needing major repairs if you are wondering how long it will last. The number of miles an engine can run depends on how well it was maintained and driven over its lifetime.

Is the lly a good motor?

While previous injector issues were laid to rest with the LLY, the common-rail injection system still had a few minor quirks, along with the injection system still being void of a factory lift pump. But even though it tends to be viewed as the least desirable in the Duramax lineage, the LLY was a very solid engine.

Which is better LB7 or lly?

LB7 gets way better fuel economy, runs cooler. I do like the automatic high idle on the LLY(with the auto start), beats walking out in the cold and flipping a switch.

What is code P0205?

OBD-II Code P0205 is defined as a Injector Circuit/Open – Cylinder 5. The engine control module (PCM) has special transistors called “drivers” to turn the Fuel Injectors on and off in the Fuel Injection System. If the PCM cannot control the fuel injector, it will set code P0205.

Why does Duramax idle rough?

Rough idle can be caused by bad engine mount— exhaust contacting the frame, bad injector, or weak cylinder compression.

How do I fix code P0208?

What repairs can fix the P0208 code?

  1. Replacing the ECM.
  2. Replacing the cylinder 8 fuel injector.
  3. Repairing the wiring harness.
  4. Fixing connection issues.