That still sounds like an internalfuel leak. When you press the pedal, that introduces air and is probably giving the right mixture for starting. After 4-5 hours, the excess fuel may have evaporated.

 

If it is still sounding like a internal fuel leak, where or what would be causing it and why isn't there a pressure drop in the gauge after a minute. After I shut the truck off and it sits for a minute, it will give the hard time starting...talk about puzzling...