Non-Mopar: NEED HELP- 1995 Ford F-250 Diesel

There should be a seperate Fuel Injector Control Module (FICM), and I think it's on the driver's side inner fender. If you have a buddy's truck to swap parts off of you might look into swapping this out.

How long did the truck sit before he bought it? I don't know if you have different blends of diesel throughout the year, but could it have summer fuel in it and be gelling up?

One thing I remember from my 7.3 days was that if it was below about 30 degrees outside, it'd better be plugged in or it wasn't going to be happy in the morning. It would lope and smoke like crazy until the oil got warmed up. Just something to think about if you're working on it outside. Good luck with it.