When my truck sits overnight it has a hard time starting. Usually 5 cranks until it fires. But if I bump my fuel system and let it run for 10 or so seconds it'll start no problem or if I park down a hill. Is my sump affecting my start?

 

You have a loss of prime issue. Are all you bolts tightened down on the fuel system? Mainly the one on the back of the head. This will cause your no start/delayed start issues.

 

What do you mean back of the head? The suction side of the Fass?

 

On the backside of the head there is a bolt that returns fuel not used by the injectors to the tank. It loosens up over time and lets air into the system. It is a 17mm bolt head.

 

Oh gotcha! I'll check it out. Thank you👍🏻