86 Ford F-150, 302 Gas Problem


Old 01-16-05, 07:51 PM
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Cool 86 Ford F-150, 302 Gas Problem

I have an 1986 Ford F-150 XLT Lariat with dual tanks. The problem is gas is transfering from one tank to the other constantly. If I fill both tanks then one will overflow and spill out of the gas cap until I switch tanks. If one tank is empty and the other is full the gas will transfer to the empty tank and I have to constantly change tanks. I hope someone has a resulution to this one because I have been working on it for over a year and am just stumpted.
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Old 01-16-05, 10:11 PM
Join Date: Dec 2001
Posts: 2,538
if the vehicle is fuel injected there is a frame mounted black plastic canister with 4 fuel lines going in and 2 coming out to the engine they sometimes placed a fuel filter in the canister on some models, this canister has check valves inside it to keep the fuel from entering the other tank if a valve is leaking or bad it will cause your problem.

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