[Cam0323]

I have a 2001 cummins. If my truck sits overnight, it starts fine but if i drive it for a while, shut it down and try to fire it back up within an hour or two, it has a very long crank time. It will eventually start but takes every bit of 15-20 seconds. But once it starts, it runs fine. It has an edge tuner. Don’t know a whole lot about the truck as far as upgrades. Any help would be appreciated

 

[Clunk]

When you park it over night, is the front end lower than the back end?
Kinda thinking about an air issue.

 

[Cam0323]

Yes, usually. I did forget to mention that. If my front end is below rear end, it starts fine. So i thought about about fuel delivery issue but I’m new to diesels so i wanted to get other opinions before i threw a pump at it

 

[bigfish95971]

Probably a lose banjo joint on the back of the head return line. Try tightening it with an end wrench while laying on the valve cover. Could be other places like the T fitting but start there.