Question about 1986 Ford F 250

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1995 dual tank fuel transfer problem \truck runs properly only on front tank. When set on front tank rear tank over fills.

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There was a fuel line check valve recall on these back in the day. It should have exterior check valves between each line and the fuel pump/ sending unit inlets and outlets. You will have to be looking right at each fuel pump assembly to see if these are installed. Someone may have replaced a pump without reinstalling the check valves. If the connection to the fuel pumps looks the same as the ones on the filter (left side of frame under driver's seat), there is not a check valve installed. It will be an obvious extra fitting between 2 and 3 inches long. Otherwise, you will have to replace the rear fuel pump/sending unit as an assembly. I believe that is the only (and best) way to buy and install it. You can drop the tank, but it's sometimes easier to take out the carriage bolts in the box and raise it for easier access to the fuel pumps. The filler tubes have to be disconnected from the box, as well as the light wiring.

Posted on Jun 22, 2009

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Posted on Jan 02, 2017

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1996 f150 rear gas tank is bleeding over into front tank and over filling it. Gas is running out of vent tube on front tank


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1 Answer

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