I've got an intermittent problem. My 1995 7.3L diesel runs fine, then just dies. And it dies like its running out of fuel. Once it begins to fail, feathering the accelerator has no response from the engine.
So, I've replaced the fuel filter, dropped and cleaned both fuel tanks, bypassed the fuel tank selector valve so that the rear fuel tank is feeding fuel to the lift pump without going through the selector valve, replaced the fuel lift pump and replaced all of the rubber hoses in the fuel system.
Tests at the schrader valve on the fuel filter housing show a consistent 58 lbs pressure.
On a recent test drive of 20 miles it ran flawlessly. The next day, it ran for 1 1/2 blocks and then died (again apparently from fuel starvation). Except that when I opened the fuel filter housing it was full of fuel.
So, I'm starting to think that it's either a bad main pump, the computer or an electrical issue of some sort.
Based on this description, do any of you have any suggestions what might be the problem? Or can think of any additional tests I can run to determine the problem?