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Old 10-06-2012, 03:09 PM
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P2291

truck is a 05 HD F250 6.0l with 170K+ with EGR

truck had 2 injectors on the same bank go bad back in Feb so i did all of them in that bank (1,3,5,&7) while i was in their . truck ran great and towed fine since then until last night when it cut off on me while towing and would not restart

had a buddy tow my trailer home then pull my truck luckily was only a couple miles from home.

codes where

P0266 cyl 2 contribution
P0341 cam position
P2291 ICP low - Eng Crank

cleared codes this morning and the only one that returned was P2291 ICP low

i data logged while cranking

ICP V was .24v
IPR duty was 84.7%
ICP demand was 8.4 MPA
ICP filtered was 0 MPA
RPM 210

oil pressure gauge on dash never moved, stayed on L

also removed the oil filter and watched the bowl fill within a few seconds. even without pressing/holding the drain back valve shut so i believe Low side oil is ok

from what i have read even with a stuck/inop IPR you should still get .5v ICP (200psi)

just looking for opinions weather you think it may just need a updated STC Fitting with the bracket/brace or need a HPOP and IPR ???

next chance i get i will prolly just rip the Turbo and Hpop cover off and see what the STC looks like
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Old 10-06-2012, 03:44 PM
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It takes 500 psi of oil pressure for the pcm to command the ficm to fire the injectors.

A trick to test whether it is a bad icp or actual HP oil leak is unplug the ICP, the pcm will substitute a default value of 750 psi for the truck to start on.

If the truck starts and stays running it is a bad ICP if it quits then you have an actual HP oil leak and air testing is required to find where.
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