I have an 03 f250 with the 6.0l. 99,000 miles and the lifter retainer broke and caused #1 and #2 cam lobes to wear completely bald and destroyed LPOP, long story short---I rebuilt the engine, replaced IPR, HPOP, stand tubes, and tried to fire it up, and no start....I managed to hook my Solus scanner, came back with 2 codes, P0488 & P0408. I noticed while plugging in the TPS and the the other sensor on the throttle body, have no actual electronics in the sensor, they are just dummy sensors. I check on ICP Actual pressure and while cranking, it stays at 0kpa, tried unplugging the ICP, still nothing. I'm getting LP at 70PSI. I'm so stumped and have not a clue in the world what to start with next...please help
when i had the ICP unplugged, i also had my scanner read the ICP pressure, and it went into Limp mode and made the the default value of 7000kpa for both ICP Desired and ICP Actual. which leads me to believe the wiring is perfectly fine. the IPR is brand new, and i even tested it and it is fully functional...
How long did you crank it after doing all the work? It will take a decent amount of cranking the engine over to push the air out of the HPO system and build pressure.
Icp voltage is at 0.18v, which from what I've read is normal for 0 psi/kpa. I cranked it over for 30-45 seconds with 1 minute intervals for over 2-3hours. Ficm voltage is perfect on all three banks. I had to replace the starter on this thing too. IPR duty cycle Is 15% key on, shoots to 85% while cranking, still no ICP pressure...
okay, glad you said something. i popped valve covers off, and took oil rails off, the branch tubes are messed up, could this cause me not to get any ICP pressure?
Are you saying that these dummy sensors are stating that i have the05 throttle body?there isnt a throttle blade or any indicator that there was a blade..
Yes. Maybe the previous owners installed a 05+ elbow.
As far as your other problems please keep us updated on your status please, so it can help out other people having the same problems
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