This is Roger: I have a 1990 F-150, 302, 2 wheel drive, fuel injected. Recently the engine will stop running. When I try and start it again, it will turn over but not start. If the vehicle sits for a period of time ( has varied from a day to 15 minutes), it will start fine, run for 5 minutes then shut down again. I can repeat this cycle time and again. The only thing I have done is replaced the fuel filter. Any ideas??