99 7.3 powerstroke running problems

[99powerstroke_superduty]

i have a 99 powerstroke that has running problems. it takes forever to start i have replaced the glow plugs and the wiring harnesses and the glow plug relay. made sure all the connection are good and no broken clips. once i get it started it idles like it should. i take it out on the road and then it looses all its power and i have to pull over and shut it off. let it sit for a while and limp it back home. the p1211 code shows up along with other codes saying the injection control pressure is above/below desired. whats this mean? i need help!!!!!

[kaya@bernhausen]

could be an ipr or icp issue. what are the exact codes you are throwing? all of them, please

[99powerstroke_superduty]

p0562-system voltage low
p0237-turbo boost sensor A curcuit low input
p1209-injection control system pressure fault
p1316-injection circuit and/or idm codes detected
p1212-icp voltage not at expected level
p1210-injection control pressure above expected level
these are all the codes that came up when i plugged it in

[kaya@bernhausen]

it sounds like the icp sensor or wiring. have a close look at the icp wiring. disconnect it. see if there's oil all in the connector. you can also try running it disconnected. see if that changes the symptoms

[99powerstroke_superduty]

i unplugged the icp connector and there was no oil on it. ran the truck while unplugged and still acted up. think i should go with a hpop upgrade???

[KMA Towing]

I assume you can read live data. what are the icp and ipr readings when it is running great and do you get different readings when it is acting up and you have to "limp" it home?

how does the harness to the icp look? is there a spot where it rubbed through a wires coating a few inches down from the plug or elsewhere on the wiring harness?