Need Help. 2001 Ram 128k miles. for 1-1/2years no problems great performance, January on road trip Lift pump went out in San Diego. On Friday night (BAD BAD) Tried Dodge dealer, open Saturdays (Worse than no help), bought and installed lift pump ourselves and of course changed fuel filter again. Find fuel filters cheap insurance have changed 5 times to this point. No problem. Still went to Cal Pacific Cummins in El Cajon on Monday, got computer updated and check over before Mexico. Good People, Good service. All Good.
March arrives we have gremlins! Big time. Truck is getting harder and harder to start. Engine cranks fast, lift pump runs excessively long, First thought Air leak. Been looking. Again changed fuel filter, have changed out rubber fuel line between filter and I. Pump. In a quandary about fuel return over flow valve. Could be Defective? Possible slight leak or constriction at fuel tank. Have crawled in over and around find no fuel leaks or drips. Could new Lift pump be marginally defective? Even suspected quick connect on fuel lines to frame lines could leak enough to cause air leak? Appears to deliver ample volume at injector pump test port. This is why we still feel air is our problem. (No fuel pressure gauge yet but next on list after gremlins removed!)
This morning truck completely fails to start. Same difficult trouble, fast cranking and long running lift pump, still fuel to injector pump. Appears to the eye, ample and air free. Help frustrated and running out of ideas.
Any and all suggestions welcome please!