Long story bought a 03 f250 6.0 that started hard and ran with low power, stall with hard restart white smoking. Previous owner sold as having bad head gasket. Truck would run and start but smoked alot and built pressure in degas. With in the past 500 miles truck had 2 new heads, oil cooler replaced, egr deleted and egr cooler removed. It did have oil in coolant.

Ok this week I pulled heads and replaced with OEM gaskets and studs and now it cranks but no start. Gaskets looked like they had not failed though but 3 injectors were not seated properly and had blow on inj. Replaced inj. orings and seals, has oem oil filter and cap, oem fuel filter too. Ficm has 48.2 volts cranking and key on, pluggins are tight. Dash gauge shows good oil pressure when cranking. Fuel filter fills when cranking. Tried with ICP unplugged no change, tried another oil filter and cap no change. Glow pugs are drawing current. Both batters tested good. I have cranked it over for 2 days about 50 times.

Here's what I found when scanning with AE software while cranking. Battery was lower after cranking several times trying to record the DATA.

Codes Stored After I cleared them only 403, 405 and 1000 come on.
P0403
P0405
P0603
P01000
P2623-----(This one has me wondering) Injector Control Pressure Regulator Circuit Open circuit, short to ground, IPR stuck


CMP and CKP are in Sync -Yes
FICM information for Sync -Yes
FICM main power-48V
FICM Vehicle power- 11.5v
Injector Control Pressure(PSI)- 320.08 Highest I showed
ICP Desired(PSI)-1956.2
ICP Volts-.55
ICPR(%)-84.77
Engine RPM-154


So I suspect HPO leak, HPOP weak or IPR bad or dirty. This is a 2003. I will pull the IPR and OHM it and check the screen. Has any one pressurized an 03 through at the oil rail on the drivers side and it so how did you do it. I am hoping I can command the IPR with the AE scanner for the air test. Any other ideas. It did start before tear down but not after.
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Truck needs 525psi of high pressure oil to fire, so that's your problem right there. Your IPR duty is maxed out (trying to compensate for the lack of oil) and still not building enough pressure.

AE will only command IPR to 85%, you really need to hook up an external 12V source to close it fully. Don't leave it on very long either.

When it started before the tear down it still sounds like it was weak when it did start though right?

Definitely a high pressure oil issue though. Pull the IPR and inspect the screen on it.

 

Thanks for all the help guys you nailed it. Ended up a HPO leak under the drivers valve cover. The high pressure braided line quick connect came off on the block side. I also pulled the IPR from ther top with a Lisle socket, had to pull the degas tank and the FICM and was able to get it with a 6 in extension and a swivel. I checked the screen it was in good shape but had a couple of small pieces of dirt on it. I cleaned that and reinstalled it. I did find the IPC sensor leaking oil in the connector so I left it un plugged and will replace it and the connector. Truck start ok just cranks longer possibly due to the IPC unplugged. Still have major problems with the way it runs but I will start a new post for that. Thanks for all the help.

 

Well if the ICP is unplugged it's not going to drive down the road very good, it's like a last ditch effort thing to get it home. The PCM just goes to 2000psi desired ICP and stays there, so it will probably only limp along at 40 or 50mph... Get the ICP and pigtail replaced and try again, that will probably fix your issues.