Question about 1993 Ford F250

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F-250 FUEL PROBLEM

I PURCHASED A F-250 W/A V-8 302 WITH DUAL TANKS THAT WERE BOTH LEAKING.I REPLACED THE REAR TANK WITH A NEW ONE AND NOW WHEN I PUT FUEL IN REAR TANK IT PUMPS IT TO THE FRONT TANK.THE TANK SWITCH ON DASH IS SET TO REAR TANK WHEN THIS HAPPENS. THANKS

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  • Patrick4x4 Dec 25, 2008

    I just bought a 1993 ford f250 and it started pumping gas into the front tank,which makes the front tank over flow at the filler neck.

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Hi, My brothers 250 had the same problem and is now fixed.The fuel pump in each tank has a check valve that allows the fuel to run in one direction only. When this valve fails to close fuel runs into that tank when the other pump is running. We replaced the pump and all is well. Dan

Posted on Jan 25, 2009

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1985 f150 lariat with dual tanks, rear tank rusted and leaking, would like to know what to plug to make front tank work on its own with required fuel pressure. its a 302


I see that you have not received an answer yet. I had a dual tank Diesel which had a switch under the dash to change tank feeds. Both tanks reported fuel amounts to the same fuel gauge as each tank was switched on.

If this is the system you have (using gasoline) then simply turning the dash control should isolate the rear tank. If yours is different, you need to look underneath the truck at the fuel line routing.

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Regards,DT

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