I am new to this forum. Here is my issue, I have a 1993 F150 5.0 Fuel injected, truck will start and run for approximatly 10 - 20 seconds and just die. I can wait 10 -15 min and truck will start and run great and die again. I started truck and let die, removed schrader valve cover and depressed with a small screwdriver..NO Preasure. I have duel tanks and does the same on both tanks no differance...I need help with this bad I am at a loss.