How's it going everyone? Needing some help here. Have a 1989 f250 7.3 idi. Can't seem to get this pos running right. As of now it has a brand new injection pump. New injector lines and return lines from injectors. Glow plugs and GP controller. Just picked the truck up from the diesel shop today, they put a new IP on it.... Right out the gate it wouldn't start without either.... Spray with either and she fired up....makes a 2.5 hour trip home with zero issues.. get home, turn it off.....30 mins later she won't start. Give her a shot of either, still no start. So now we know the IP is brand new, brand new glow plugs, brand new GP controller, etc etc. I'm at a loss. What else could it be???