runs good, then bad, then shuts down

Thanks for all of the suggestions! I will dig into it this weekend and see what I come up with.

PS - Love that spark tester tool Super-Cuda! I need to get me one of those..

That little sucker saved me a lot of work on my 2001 Dodge Ram, 5.2 Magnum.

Engine turning over but no start. Everything pointed to crank sensor which is , as anyone whoever change one knows, is a real ***** of a job to do.

Installed it on the coil...good, installed in on an ignition wire...good. Depressed the center of the shrader valve on the EFI rails...no pressure. Problem was in tank fuel pump. Replaced, all good!!