01 p-pumped 24v won't hold prime
#1
01 p-pumped 24v won't hold prime
so first off this is not my truck and it's in another state. It's my brothers truck and he had the p-pump conversion done by a local cummins guy. They put a 180hp p-pump on it and it has a fads 150 titanium lift pump. He has to crack the fuel filter to prime the fuel system and it starts fine. After shutting the truck off the fuel pressure drops to 0 rapidly. Goes to restart and lift pump kicks on but doesn't pump fuel. No external leaks and no air in the system that we can tell. It has a stiffer spring in the lift pump. Anyone have this issue or know why it would lose all pressure so rapidly?
#3
That's what I had him check first. I don't know how they plumbed the pump in. He says everything is fine on the return and no external fuel leaks. It's odd that it will hold pressure once primed though. I would think if a return valve was stuck or dirty it wouldn't hold pressure at all. The p-pump is a reman