check oil sender. it runs the lift pumpI recently bought a 94 6.5 diesel, it ran for a few months then one day it started up and shut off and wouldnt start again.
I rplaced the LP on driver side frame rail, and the fuel filter. bled air and wouldnt start. A week later I got it started with the help of a little bit of ether, it ran for 2 30min periods. on the 2 period i shut it off and let sit for 5 mins and it never started after that. 2 days later I got it running by bleeding more air out, and i have looked for air leaks and no luck. but i drove the truck for 2 days straigh and then it shut off going down freeway.
If anyone has any idea or a place to start please anything will help.