1991 F250 has to switch between tanks frequently to keep it running

Asked by JeffreyG302 Jan 24, 2023 at 12:37 PM about the 1991 Ford F-250 2 Dr STD Standard Cab LB

Question type: Maintenance & Repair

My 1991 F250 runs great, but frequently requires switching tanks, even when
both are full. Anyone know what the fix is?

2 Answers


Check the fuel pressure and flow of the lift pumps inside the fuel tanks, the problem I see is the pumps maybe overheating and shutting down after a period of time so it’s going to be hard to verify they are shutting off. Another problem these had is sticking fuel tank switching valves. Some even had a filter inside the little plastic bowl and these get plugged, so look for that also.

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