6 liter cold start

[kbartley04]

allright heres the issue i have a 2004 6 liter and im having cold start problems this year. ive never had these problems before and ive already replaced all 8 glow plugs. it starts fine when you plug it in, but if it sits over night you have to crank long and hard on it to get it to start. anybody have any ideays on what i could do next?

[TwinTurboStroker]

When was the last time you changed the fuel filters???

[kbartley04]

i change them everyother oil change but it has been awhile. I was having injector issues but got them all straightened out now this started.

[TwinTurboStroker]

Could possibly be your glow plug relay, any trouble codes???

[kbartley04]

no codes and when i changed the glow plugs out i put a test light on all the wires and they were hot going to the plugs if it is the relay were would that be located?

[TwinTurboStroker]

Its on the passenger side valve cover, towards the front, looks like a mini amp

[kbartley04]

is there any way of knowing for sure if it is the relay once i locate it?

[xjeeper]

FICM is bad?, last year I had the same symptoms on my 04 and it was the FICM.

[kbartley04]

dumb question what is the FICM?

[a2elvis]

Originally Posted by kbartley04

dumb question what is the FICM?

No question is a dumb question
The FICM(fuel injection control module) is the brains and power to the injectors. The power supply typically is the part that causes the hard start or even no start cold. The FICM should supply 48V to the injectors all the time, most likely yours is not.