6.6 turbo diesel fuel computer??

[psychotuner]

Hey guys, might be in the wrong thread, sorry move it to the correct place if needed...

Anyway, I have a 2002 Chevy Silverado 2500HD 6.6 Turbo Diesel.
Ive got a problem with it running. It seems to start up and run fine, but after it warms up, it dies and won't start back up.


Im almost POSITIVE it's this fuel box thing that is the problem, however, I need YOUR help identifing this box...

It's on the passanger side, its a box with fuel lines going in and out of it and a harness plugs into it.

What is this called? I need to find a replacement asap!!

 

[maxaholic]

Ficm

 

[psychotuner]

fcim? whats that?

 

[psychotuner]

or is it called a fuel injector pressure regulator?

 

[8100 Power]

Fuel Injector Control Module

 

[PhilsLB7]

So if this is the FICM, where exactly is the fuel pressure regulator? Near the CP3? Sorry, still learning!

 

[Lb7KID]

So if this is the FICM, where exactly is the fuel pressure regulator? Near the CP3? Sorry, still learning!

in the vally near the fron of the moter yes next to the cp3 if understood right

 

[PhilsLB7]

Thanks for clarifying this for me. So based on psychotuners problem, do you think it is the FICM or the fuel pressure regulator?

 

[ripmf666]

Also can be a bad injector or two

 

[psychotuner]

Replaced the FICM and the turck is still having problems.
Basically it's alomst like its a heat thing. I can go out in the morning fully cold start it, drive it around no problems, shut it off, come back and it won't re-start.

Sometimes, priming the fuel filter with the button thing will help re-start the truck, weird.... WTF

 

[beach_33]

sounds to me like it is losing prime

 

[TheBac]

Loose filter/unseated filter o-ring/loose WIF?
Filter head air leak?
Possible pinhole in a fuel line?

 

[jdlover1]

Have you changed your fuel filter lately? If so and the problem started afterward you might have cracked your filter.

 

[Big Block 88]

Cracked Wif sensor

 

[PhilsLB7]

I'm with most of you guys, it does sound like it's sucking in air somewhere. But how does the system have prime when he starts it cold in the morning and after it heats up then won't start? I understand that when things heat up they expand (i.e. allowing air to enter the system), but if he looses prime then he shouldn't be able to start the truck again in the morning either, right? Do you think it could be a relay? Is there a relay for the FICM? Just want to understand for myself and hopefully help this guy out.

 

[Mike_S]

So if this is the FICM, where exactly is the fuel pressure regulator? Near the CP3? Sorry, still learning!

The rail pressure regulator, or FCA (fuel control actuator) is physically incorperated in with the CP3.

To the OP: Check the filter head, the "water in fuel" sensor in the bottom of the fuel filter, the plastic bleeder screw in the top of the filter head. Look for anywhere air can get into the fuel system before the CP3.

 

[PhilsLB7]

Thanks Mike!

What do you think about my other questions (posted a little while ago)?

 

[psychotuner]

you guys are awesome! Ill check that filter. Ill replace the fuel filter. I hope it's the problem!!!!

 

[Bryce418]

While your changing the filter give the fuel a sniff, it it smells faintly of gas it may be the gas vaporizing in the filter head causing a vapor lock.

Another quick way to check for gas is to pour a small puddle out on a non flammable surface and try lighting it with a lighter, if it lights and maintains a flame it has something other than diesel fuel in it. I have seen people overdose fuel with alcohol based anti gel additive like diesel 911 cause vapor lock.