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Power Strokes
7.3 Tech
No Start, No oil Pressure- Stumped
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[QUOTE="rdnkbowhuntr, post: 1348150, member: 13528"] 99.5 7.3L 300K mi, truck died after accelerating from a stop a couple weeks ago. No jerking just slowly died, no power, and no previous symptoms to show there was any issues. It wasnt getting any high pressure oil pressure. Oil was at the add mark of the hashes of the stick, I was due for an oil change, so it got all new Rotella T5. Still the same thing, no HPO. Reservoir was empty so I refilled it and the truck fired and ran horrible, I assumed it was just air, for about 5 min. Then died, reservoir was empty again. I refilled it and I got oil shooting out the reservoir test port during cranking. Replaced IPR, ICP and CPS, still nothing. I only use Motorcraft filters. I pulled the HPOP and it had brass shavings coming through the front seal. I sent it back to Joey at Terminator, it was only 18mos old. He said it was bad and appeared it wasnt getting any oil. So while Joey was doing his thing, I pulled all 8 injectors and replaced all O-Rings and brass washers from Alliant and rubbed them down with scotch brite pads to clean them up. Truck has 8-AD injectors. I cleaned the cups using a brass brush, everything looked brand new. I have never opened the vlave covers in the 300K miles so I took this time to put 8 new motorcraft glowplugs in, VCH and UVCHs. I pulled the Melling LPOP and replaced it with a new one, even though it looked fine and was only 2 years old. I also installed a new quick fill check valve, spring and ball bearing in the drivers side head, the new spring was about 1/4" longer than the old. I got the pump back from Joey and got it installed, put new HPOP feedlines on the truck and cant get any substantial pressure built. I pulled the oil lines and I have residual oil when they are disconnected. The reservoir stays full, no oil is coming out the injectors spouts when cranking, and when I remove the ICP after cranking it has residual pressure still in the head. Everything in the valve train is still intact and moving appropriately. I am seeing 67% IPR duty cycle and only about 200psi on HPO, while cranking right now. Not that it matters but my fuel system is maintaining 70psi. With the ICP disconnected the truck is showing about 2600psi and 67% duty cycle during cranking. I have a custom burned chip from larz at ******** and I have tried removing the chip, changing the settings, nothing seems to matter. I removed the oil filter and the check valve is down and has good tension. Oil is pumping out the filter adapter when cranking. I am stumped right now. I have also overfilled the truck with oil, about 3 qts, and jacked the rear up about 1 ft and still no difference. When I remove the test port on the reservoir I am not getting oil when cranking, but the reservoir is staying full and not draining down. Any feedback or things I have missed before I am forced to pay a shop, something I have never done. I only have a bluetooth adapter and TorquePro on my phone so I am limited on some scanning. I am not getting any hard codes. [/QUOTE]
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