Hello once again problems 04 f350 6.0 have replaced hpop oil cooler ipr tubes injector seals swaped icps with known working units pcm swaped iprs vefiied low pressure oil ed repaired my ficm in april cked all electrical connecters all air pressure tests have passed no leaks have been found anywhere i get 2291 code shows only builds 350 psi when truck is cold fires great runns like a champ then u turn it off and wont start u wait anywhere from 3 to 30 min and fires again perfect. any suggestions ????

 

Sounds like a HPO Leak

I cant follow all the stuff you did or tried

 

sorry typing on my phone... we have repalced hpop, oil cooler,tubes, injtector seals, air tested system and have no leaks also replaced ipr icp pcm with known working units we have ckd all electrical conectors thru entire harness also tested and took apart and re tested lpop

 

Where is the ICP sensor Location

 

it is on valve cover

 

<TABLE style="WIDTH: 681pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=908><COLGROUP><COL style="WIDTH: 77pt; mso-width-source: userset; mso-width-alt: 3730" width=102><COL style="WIDTH: 86pt; mso-width-source: userset; mso-width-alt: 4205" width=115><COL style="WIDTH: 237pt; mso-width-source: userset; mso-width-alt: 11556" width=316><COL style="WIDTH: 281pt; mso-width-source: userset; mso-width-alt: 13714" width=375><TBODY><TR style="HEIGHT: 25.5pt" height=34><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; BACKGROUND-COLOR: transparent; WIDTH: 77pt; HEIGHT: 25.5pt; BORDER-TOP: black 0.5pt solid; BORDER-RIGHT: black 0.5pt solid" class=xl66 height=34 width=102>P2291</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black; BACKGROUND-COLOR: transparent; WIDTH: 86pt; BORDER-TOP: black 0.5pt solid; BORDER-RIGHT: black 0.5pt solid" class=xl66 width=115>ICP</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black; BACKGROUND-COLOR: transparent; WIDTH: 237pt; BORDER-TOP: black 0.5pt solid; BORDER-RIGHT: black 0.5pt solid" class=xl65 width=316>Injector Control Pressure Too Low — Engine Cranking</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black; BACKGROUND-COLOR: transparent; WIDTH: 281pt; BORDER-TOP: black 0.5pt solid; BORDER-RIGHT: black 0.5pt solid" class=xl65 width=375>ICP cranking pressure too low</TD></TR></TBODY></TABLE>


Ok then did you do change the Dummey Plugs Too

And when you did Injector Orings did you use the Aliant Power ones and Put a NEW Oring in the Top of the Injector?????

If you bought Ford Inject Oring kits then you didnt change the one I mention

 

Hello yes both dummy plugs and aliant seals

 

so now my question is would my ficm not be responding properly