Hi, I have a "94 F-150 4X4 5.0L My problem is that the truck cut off after a few miles. Then if I wait a few minutes, she'll start up and goes for a few more miles. The miles it goes before it cut off and the minutes. I wait to start varies. I changed the fuel filter but no difference. Any thoughts?

 

my 87 5.0l was doing same thing look at all the coil connections and see if all are tight