air leak in fuel got a hard ball to throw at u
 

hard to do a motor swap because my boy dropped a nut in my intake.motor ran perfect for three days.all of a sudden it went airbound when i went to crank the truck. bled the fuel system,ran fine then LEFT ME ON SIDE THE ROAD.now after i prime it runs but fuel filter is half empty every time.i read joe g review and understand everything.but never no hard starting.it just went out

bad o-ring ... pull it and replace the o-ring