Need Some Opinions...

[Spoolin']

Hey all, I'm new to this forum but a regular over at the CumminsForum. Here's my problem...

The truck:
2005 F-250 Super Duty 6.0L CC/SWB 2WD

The truck came in for starting fine when it's cold but after it's warmed up and has sit for about 15-20 minutes it doesn't want to start. First thing we did was check and replace the fuel filter and fuel/water separator, which the water separator on the underbody was clogged bad. We run it and let it sit for 15 minutes, come back and it won't start. It'll crank all day long but won't start, so we figure it's got to be a fuel problem. We hook up a FP gauge and here's our results:

Sitting over-night cold start:
Key on, engine off - 52psi
Key on, engine on - 52psi @ cold idle

Warm:
Key on, engine off - 52psi
Key on, engine on - 53psi @ warm idle
No lower than 47psi @ WOT

10 minutes sitting after being warmed up:
Key on, engine off - 50psi (pressure builds slowly)
Key on, engine on - 50psi @ idle, jumps to 51psi, then jumps to 54psi and stays

20 minutes sitting after being warmed up the fuel pressure is normal during key on, engine off but the truck will not start. It just cranks and cranks.

I plugged in the scantool to get some numbers...

When the truck will not start:
Engine oil temp - 221*
Engine coolant temp - 174*
Fuel level input - 61%
Fuel level input volts - 0.77v

Now the truck finally threw a code while we were cranking:

P2291 - Injector control pressure too low - engine cranking

And in the numbers we found while cranking...

Injector control pressure - cranking - 266.21

Any gear heads out there? I know this is a bit long for a first post... but thought I'd come to the guys who know Fords best

[Spoolin']

Forgot to add that we unplugged the Engine Oil Temp Sensor which put it at the default -40* and it still wouldn't start.

[Dusty's Diesel]

No start condition This guy was having a similar problem.

[Dusty's Diesel]

06 No start, no Codes.. This one says you need a minnum of 500psi ICP press to start???

[Spoolin']

Thanks for the help Dusty, I searched the forums about 5 times... guess I didn't use the right keywords

We'll be on the right track now that we know the ICP is too low when cranking.

[Dusty's Diesel]

Just go to the top to forrums than go to 6.0 motor problems and just go through page by page.

[WildBlue]

I just got my 05 F250 CC LB 2wd back on Monday, and it had the same symptoms. The first trip to the shop they replace an injector that was bleeding by, and this fixed the issue for about one week, and then it would cold start, but no warm start, and I took it back into the shop. This time they replaced the STC fitting and relaced the IPR valve. This was all done under warranty, and the truck is starting and running great. The STC fitting get loose after it gets warm, and does not let the oil pressure build up to the required level. From my research it could also be cracked O-rings under the valve cover, and they have a TSB for checking for leaks.

Good Luck
Later,
Scott

[m-chan68]

Originally Posted by Spoolin'

P2291 - Injector control pressure too low - engine cranking

And in the numbers we found while cranking...

Injector control pressure - cranking - 266.21

That is the cause of your no-start condition. To pinpoint the source of your high pressure system oil leak, you need to command IPR valve duty cycle to 100% (or as close to as possible) using your scan tool with the key-on/engine-off. Remove the ICP sensor from the passenger side valve cover and screw in an adapter plug that you can connect your shop air supply. Now listen for an audible air leak, using a stethoscope. Open the oil filler cap to find leaks from bank #1. Disconnect the air inlet tube from the air filter and listen for leaks from the PCV tube leading up the to air inlet to check for leaks on bank #2. If the leak appears loudest from the back of the engine (which is the most likely spot on 2005 model years), the STC fitting has failed. The replacement part from Ford is part number 4C3Z-9B246-C which is updated to a one-piece design for a permanent fix.

Originally Posted by Spoolin'

Engine oil temp - 221*
Engine coolant temp - 174*

At those temps, I would be replacing the EGR/oil coolers as well, while you're "in there" repairing your low ICP leak. DO NOT forget to replace the screen under the oil cooler.

Ford Part Numbers:

EGR cooler 4C3Z-9P456-AF
Oil cooler 3C3Z-6A642-AA
Oil screen 3C3Z-6C683-AA

[94f250]

yes the icp is under the turbo next to the ipr im guessing that it is one of those two our you have an internal hpo leak

[m-chan68]

Originally Posted by 94f250

yes the icp is under the turbo next to the ipr im guessing that it is one of those two our you have an internal hpo leak

That's only on 2003 model year trucks or early-build 2004 model year trucks (with 2003 model year engines) in them. From late-build 2004 model year to 2007, the ICP sensor IS located on the passenger side valve cover next to the GPCM (Glow Plug Control Module).