I have been having issues with fuel. Im good mechanically, not so great electronically. Ive had this truck for a little over a year. Have had no issues, other then about 4 months ago the fuel pump has been tempermental, not sure if it is the pigtails, checks relays, fuses jiggled the harness (its worked before) i get spark and air. Starts on starting fluid. Yet it becomes tempermental, runs fine hear the pump kick on, then you wont and she wont start. I dont really wanna drop the tank and change a pump if its still good (ive done this on a 88 ranger) but looking at electronic schematics im not sure where to begin.

 

You begin by telling people what you drive, what year, engine, trim level, 2 or 4wd, etc etc.......
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1990 f150 single cab shortbed 6.5" skyjacker 3" body lift on 35s 302ci engine 5 spd

 

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