I have no clue about diesel engines, and i told my friend that I would look around for him to help troubleshoot..

Anywhoooo.... He drives a 97 Dodge Ram 2500 with the 5.9 Cummins 12 valve inline 6 diesel engine.

Sometimes it starts, sometimes it just sits there and cranks for forever without starting. He usually has to turn the key over several times and press the accelerator 3 or 4 times then try to start it before it finally comes to life.

We have both thought down most things and it sounds to us like a fuel delivery issue. or he thinks maybe a gasket for an injector or a seal went bad and now air is getting into the diesel.. hmm

Any help much appreciated, thanks!