Join Date: Nov 2007
Location: Los Gatos CA
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Engine oil fills HPOP reservoir. I only ask because the small oil leak on my truck got a little bigger and in three days a gallon and a half was missing. I could go about 65 feet and air would get into the HPOP, and it would quit. It was just a small leak on the HPOP oring and a small seep out of the turbo pedestal that spilled the gallon and a half. I have a pressure gauge that I installed onto the oil line between the HPOP and head, reved the motor for 10 seconds and pressure bliped below 500psi and it quit. Fixed the oil leaks, added oil and has not had a problem. Weird.
You should also check the engine electrical harness for shorts, it may be seeing a condition that causes the PCM to "reboot".
I am assuming that the filters and fuel pressure is good also on your truck.
Last edited by Diesel Monkey; 11-14-2008 at 02:34 PM.