Not starting every time 2010 F150 FX2 4.6
 

Had the truck 6 months and every once in a while it just won’t start. It will crank and try but almost like not getting fuel. Then if I wait like 30 min it will start again, or if I take out the fuel pump relay or fuel pump fuse(#27) it will normally start too. I replaced the fuel relay and the fuse along with getting a new battery and cleaning the ground near the fender. Any suggestions on what I can do to where it will start every time nobody seems to be able to figure it out. Please help.