86 e150 dual tank problems

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May 17, 2004 | 10:45 AM

albesure

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From: in the tropics.s.e.

86 e150 dual tank problems

hey guys, greetings!

86 e150 302ci conversion van
does anybody have a remedy for tank flow?
when i fill up my front tank it flows to my rear tank. if there is any gas in my rear tank it pours out the filler neck. i want to be able to use both tanks again. i would really appreciate your help with this.

thanks you,

May 17, 2004 | 11:26 AM

bwhited

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Can not say I ever ran into this problem but it must be the fuel switcher mounted on the frame. It is the only place the two tanks could transfer fuel to each other.

May 17, 2004 | 01:20 PM

albesure

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From: in the tropics.s.e.

thanks for the info, do you or anyone else know it can be tested or what to check for on it or in it cloged valve,oriface,O- rings, etc.? i appreciate all of your help!
albesure

May 17, 2004 | 01:23 PM

bwhited

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It works by which port is pressurized by the in tank pump.
You could try blowing it out (very low pressure).

May 17, 2004 | 09:56 PM

Mustang 5.0

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From: Virginia Beach, VA

We just had a discussion on this topic at this thread
https://www.ford-trucks.com/forums/s...d.php?t=240093

It does sound like the fuel tank selector valve is defective. I had the same problem; when runing on one tank the return ended up in the other tank overfilling it.

My tank selector valve on the frame rail was the problem.

Jun 3, 2004 | 01:31 PM

KenFromNorCA

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Fuel tank valve

Yep, fuel tank switch valve underneath the chassis. Ford had a recall on it. The dealer MIGHT still repair it. Otherwise you can get a replacement...I think JCWhitney sells them.