Join Date: Sep 2009
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7.3L oil pressure problems Help!!!
Hey there. This is my first post and am hoping to get some help on the following problem. Truck is a 98 E350 powerstroke with 150,000 miles. Oil changes and filter every 5000 miles. My problem started with the truck dying after warming up. Found that the wires to the IPR were melted back and shorting together once the truck got hot. Found the problem and repaired the wires and the truck ran fine for a month. When I repaired the IPR I did an oil change, new oil filter, new fuel filter and new air filter.
1)Then I started to notice that she was smoking pretty badly when started but cleared up after a while. Smoke appears to be White when first started then blueish black in color.
2)Noticed a tapping sound coming from the drivers side valve cover. Very noticable with the breather hose removed.
3)Driving to work I noticed my oil pressure guage tank to 0, oil light came on and then pressure climbed and oil light went out. Pulled over and checked the oil level. oil level was fine but I did notice that it didn't have a clean look like it should have being recently changed.
4)Threw a scanner on the truck and received the following codes:
P1277 cylinder 7(c) - high to low side open
P1275 cylinder 5(F) - high to low side open
P0113 IAT circuit high output=KOEO self test fix second.
Continuous memory codes P0113 IAT circuit high input
Injector buzz test codes P1277 cylinder 7(c) high to low side open
My initial thoughts are to ring out all wiring harnesses pertaining to injector 5 and 7, open the valve covers, pull the injectors and replace the o rings (Would worn o rings cause my smoking problem and sudden drop in oil pressure?), test the injectors(primarily 7 and 5) (am I better off replacing them all while i'm in there?), replace the valve harnesses(I understand they are a problem on this model year), and replace the glow plugs while it's apart.
I would really appreciate any input that anyone might have as this is my first attemped at a project like this and I'm simply asuming that I'll find my problems with this course of action. I have read most of the posts pertaining to my issues. Thanks so much for the help.