Long crank

[JodyL]

Hey I was hoping someone could shed some light.
I have a 05 6.0 that has a long crank when it sits for 5 minutes or so has rebuilt oil rails, new injectors, crank and cam sensors, new stc fitting, new stand pipes dummy plugs I watch everything with a scangage 2, ficm has 48 volts, power, icp is good but no fire new batteries to could it be the ficm not letting it fire that's about the last 2 things I can think of ficm and injector harness. Thank a for any input.

 

[golfer]

what is your ICP_actual while cranking?

 

[6.0 Tech]

Fuel pressure as well, could be draining back.

 

[JodyL]

I videoed it this morning. It started at 200 then goes up to 2300 then down to 1500 and then fired. I did a blue spring a while back and idling fuel pressure is 70 lbs.

 

[TyCorr]

The truck in your avatar is an 03 or 04....may matter if you start discussing hpo pieces...

 

[JodyL]

Nope that's a 02 7.3 there.

 

[TyCorr]

Roger that ghost rider

 

[JodyL]

It fired good sometimes but others it cranks forever before it fires thanks

 

[IHPowerstroke7.3]

Biased ICP sensor?

 

[JodyL]

I suppose that's about the only sensor I haven't changed. I have good icp while cranking but sync doesn't always happen right away. New cam, crank sensor, ipr, and all 8 injectors. Ficm is good never seen it go under 48 volts for a period of time. No idea. And no reliable diesel shop around here.