07 6.0L No Start

mortal798 · Dec 25, 2012

I need the places to look for HP oil leaks. Buddies 07 has a P2290 and only makes 225psi during cranking. STC was replaced with the updated part about a year ago. Any good places to look?

suprdzlduty · Dec 25, 2012

do a pressure test on the hpo system through the icp sensor could be a oil rail plug. also check the ipr, any metal? screen on the ipr ok? did it have this issue before the stc fitting was replaced?

mortal798 · Dec 25, 2012

No, this just started. Last week it stumbled once and wouldn't build more than 1800 psi. The next day it was normal. He drove it today and it was fine, the. Went to leave to go to another house and it just went into cranks/no start. Only shows 225 psi on ICP, and when unplugged it goes to 725psi.

e.nickkk · Dec 25, 2012

Look at the dummy plugs and oil feed plugs

mortal798 · Dec 25, 2012

I will end up pulling the turbo tomorrow for him, so I will check IPR and screen for metal. Plugs for oil rails on the front or back of oil rails? I haven't had a 6.0L apart before for anything more than the HPOP and STC.

Thanks for the ideas!

mortal798 · Dec 25, 2012

Labor time to pull valve covers?

fordfreak4life · Dec 25, 2012

mortal798 said:
Labor time to pull valve covers?

10 minutes

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01PSD · Dec 25, 2012

fordfreak4life said:
10 minutes

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If you've done it a few times.. LOL

Stroker04 · Dec 25, 2012

01PSD said:
If you've done it a few times.. LOL

Agreed LOL better have some air tools and ratchet wrenches to get it done that fast.

mortal798 · Dec 25, 2012

Lol. Cool, I will update when I find something.

G Racing · Dec 25, 2012

What is icp with the engine off key on? If it reads psi with the engine off key on then you will have a bad icp sensor.

Big Angry Hillbilly · Dec 25, 2012

225 psi or so is usually what I see when the IPR is bitched.

mortal798 · Dec 25, 2012

KOEO shows 0 psi

mortal798 · Dec 26, 2012

He is driving something else for the time being. I am going to tear into it in the first week of January. Will post what I find then.

mortal798 · Jan 1, 2013

Update: went out to look at some pids and found that cranking ICP pressure is over 600 PSI now and it still won't start. Any ideas? I have never had one that would go over 500 PSI and not at least try to start...

mortal798 · Jan 1, 2013

And isn't it weird that it was 225, and now over 600?

Big Angry Hillbilly · Jan 1, 2013

ICP is not the only thing to be looking at.

If it cranks and there is a no start and the HP oil system is intact it should make 1000psi at least.

mortal798 · Jan 5, 2013

Update: looked at this truck yesterday. Cranking ICP pressure was exactly matched to desired, and IPR ramped up and down with my command. I checked the GPCM, and it was not operating. Replaced it, and the truck fired up.

Questions: why did ICP originally drop to 240?

Once the truck was running and warmed up, IPR# was 26.75%, ICPDSD was 850PSI, ICP was 850psi. ICP and IPR ramped up and down with command as they should. On the road, the truck stumbled a couple times and set a P0069: MAP sensor circuit correlation. When it stumbled, it dropped ICP down to 400psi at one point.

Can the MAP cause ICP to drop off?