Truck wont start after getting fuel..

[stl94ranger]

I have a weird on going issue that after I get fuel, I go to start the truck and it just cranks and cranks. Then after five or so minutes it starts up.. Im stumped?? Im not sure if the pump is kicking on or not?? I take the fuel pump relay out and put it back it, and that usually is the trick..but other then after I get fuel it always starts right up.. the truck is a 94..