Have a 93 F150 straight 6. Had the fuel pump replaced a few weeks ago after it died. Was running fine since then. Now sometimes I go out to start it and it cranks, I can hear the fuel pump, but nothing. Wait a few hours later and try and it starts right up. Always when it's been sitting over night. Any ideas of what to look for would be appreciated. Some mornings it will start right up and some mornings it will just crank. Thanks

 

Well after an expensive trip to the garage it turned out to be a fuel pressure regulator. Thanks for all the ideas, not.......