1992 F150 Inline Six Cylinder 4x4 with 5/speed and 135,000 miles on it. Full tune up (plugs, wires, etc.). 6 month old Ford Motorcraft fuel pump in the front tank (only using the front tank due to rear fuel pump being dead), 6 month old fuel filter.

The truck isn't wanting to stay running while driving. When cold it'll fire right up and purr like a kitten. Run it down the road and after it's warmed up it wants to die. After starting the truck when it was cold it was immediately driven 4 miles and then it died. But just sitting still, not driving it, it'll run.

What could be the problem? I've searched the forums and can't find an answer. May not be able to get the correct words searched or something. I'm thinking the TFI module or the fuel pressure regulator. Thoughts?

 

Any ideas anyone?

 

do you have a code reader? I'd get a equus 3145 ($20-$30) and check for codes first. That's a good way to start.

 

It's apparently something that is affected with warmth....

PIP could be getting bad....