88 ford 150 gas problem

Asked by alexpankey Dec 24, 2015 at 07:39 PM about the 1988 Ford F-150 XLT Standard Cab LB

Question type: Maintenance & Repair

gas coming out of front tank when switched to back

2 Answers
14,505

Guy answered 9 years ago

The check ball in the front fuel pump isn't doing its job. The rear pump is filling the front tank, Ford used to have a kit with 2 inline valves that would prevent such a problem. They went inline from the output side at the fuel pumps to keep either tank from filling up the other one.

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