Changed fuel pump-after driving and cut off engine truck will not crank for several hours

You most likly have still got a pocket of air somewhere in your line that is moving back and forth in your lines . If after changeing your fuel pump, did you bleed your system? if not you will need to do that . if you did , you may need to repeat that process again in order to get all the air out of your lines . hope this is a help, and good luck. signed Redneck car daddy