I have a 1990 chrysler new yorker with a 3.3 v6 engine. The fuel pump went out so I replaced it and the car ran fine for three weeks then lost power one day on the way home of my 140 mile round trip commute. After letting the car sit for about 15 minutes it started and I drove for 15 miles then it shut down again. After letting it sit again I was able to go about 7 miles. This process continued with each distance decreasing.
I replaced the fuel pump relay and the car ran OK for a few days. Finally I took it to my mechanic who could find no faulty readings but he replaced the crank sensor and reprogramed the computer. The car ran OK again around town (20 mile daily trips) then repeated the same loss of power again. After getting a ride home I returned several hours later and the car started and I was able to drive 10 miles home without trouble.I am at a loss as what to try next. I've considered replacing the fuel pump again (still under warranty fron Auto Zone) but it seems unlikely that is the problem because when the car runs it runs fine. I suspose the fuel pump motor could be getting hot and shutting down but? All vaccum lines are ok. How about the fuel pressure regulator although I replaced it several years ago when I replaced the fuel rail. Replaced fuel filter at same time as fuel pump.
It's like something is heating up and opening a contact which cools down and closes or something similiar with fuel pressure. Would appreciate any ideas you have.
Thanks. Frank Harrison
Thursday, February 24th, 2011 AT 3:57 AM