are you bleeding it? Do you have a unobstructed fuel supply? Did you change fuel filters?

if it is cranking well and it won't run; it is most likely air in the fuel system

I've been bleeding it changed filters but the lift pump went bad. So I have a electric pump on it at 7 psi is that enough psi? Where can I buy a new lift pump or a rebuild kit?

lift pump at peach parts

Got it running.

if you don't mind, what was the problem. So others can learn

Well a combination of half dead battery and starters going bad. So I replaced both with a optima yellow and a high torque starter. I couldn't turn it over long enough to bleed lines before battery would go dead. So it was like starting over every time I would get enough battery charged. So new battery and starter and in no time she was running.

Anybody have any problems with the om617 getting air locked in the cooling system? I'm using the jeep rad. Temp climb to bout 230 but the rad. Is cool to the touch take cap off and antifreeze is cool.

The jeep radiator is lower than the front of the engine so you need to burp the air out at the heater core, that usually works.