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2003 F-150 with slight misfire at idle

Put a gauge on it and see
Lot of work to drop the tank and replace a pump

Yous may have the controller on the frame above the spare tire That controls the speed of the pump

The geniuses at ford mounted the aluminum controller to the steel frame

Any 10 grader could have told em what happens when you bolt dissimilar metals together for a few years

Corrosion. Lots of corrosion

My 04 expy had a bad fuel pump relay in the fuse box

The geniuses also made the fuel pump relay a permanantly soldered to the circuit board

The relay for the power seats is removable. But the important ones are soldered on and can't be replaced

So you have to buy a $300 fuse box
But it's an easy swap. Maybe an hour tops
 
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