Join Date: Feb 2009
Location: Huntsville, AL
Feedback Score: 0 reviews
The HPOP is near the front of the engine, on top. There's an oil reservoir for the HPOP that sits right above it. I don't know of any good way to check the HPOP pressure without special equipment, but there's a FAQ that thows how to check the clearances under the FAQ section (but you have to take it off the truck first). You can get into the HPOP reservior to check the oil level with a 1/4" drive rachet (no socket... there's just a square on top of the bolt). Clean around the bolt first, as any debris could clog the edge filter inside the HPOP.
One thing you might try is to disconnect the high pressure oil pressure sensor. Not sure what it's called, but it's on the driver's side engine head toward the front of the engine. I think it throws an engine code, but it will use a default value for the high pressure oil. My thought is that if the sensor is reading an oil pressure that's too low, it could lengthen the injector pulses to try to compensate, and dump too much fuel.
Take this with a grain of salt... I'm fairly new to Powerstrokes, but learning a lot trying to get mine running. Read thru the FAQs and bulletins from Ford, they're really informative. If you need pictures of where this stuff is, let me know and I'll snap some in a few days when I return home.