fuel tank switch?
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Freshman User
Joined: Mar 2008
Posts: 48
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From: Mentone Alabama
fuel tank switch?
i have a dual tank system does anyone know if it will automatically switch when one tank runs out? I topped off my front tank for the first time and it took 9.5 gallons and ive since put 150+ miles on it. i had put about 6 gallons in the rear tank at the same time . my sending unit for the gauge works on front but not the rear and ive put about 30 miles on it on dead empty i had thought this 351 only got about 11mpg so if anyone has a owners manual id like to know how this system works ive been trying to run the front tank dry so i can figure out my capacity thanks!
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
It will NOT switch automatically. If the truck is pulling fuel from both tanks at the same time, I would check the fuel selector valve on the framerail on the driver side for malfunctions. Gas Tank Capacities. Short Bed. 16.5 gallons Front Tank 19.5 Gallons Rear. total 36 gallons. Long Bed 19.5 Gallons Front, and rear. Total 39 Gallons.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
It's common for the selector valve to fail.
Ford part number > >
E5TZ9189B .. Fuel Selector Valve ~ 6 ports ~ Marked: E57B-9F271-AA or E67B-9F271-BA.
MSRP: $200.98 / ftepartsguy.com price: $144.71
Ford part number > >
E5TZ9189B .. Fuel Selector Valve ~ 6 ports ~ Marked: E57B-9F271-AA or E67B-9F271-BA.
MSRP: $200.98 / ftepartsguy.com price: $144.71
Thread Starter
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Freshman User
Joined: Mar 2008
Posts: 48
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From: Mentone Alabama
will pulling from both tanks at the same time cause a problem? i was running off the rear tank once and it started stumbling when it ran out so i switched to my front tank and it started running right away
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
Fuel senders also are prone to malfunction on this year range of truck. Though most are obsolete at Ford, some aftermarket companies have begun to reproduce them on certain year models.
Don't make a difference super cab, or regular cab.
Don't make a difference super cab, or regular cab.
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
Yes, it could cause you to suck air from the empty tank. Causing sputtering.
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Senior User
Joined: Dec 2003
Posts: 237
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From: Stanchfield,MN
i dont want to hijack this thread but on my 86 efi with dual tanks if i fill both tanks and flip the switch to the rear the gas pours out of the front tank, would this be the selector switch malfunctioning?
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
I can run all the part numbers for y'all and see what's available...
But...I need to know which tank (front or rear), the engine size, the trucks wheelbase, and whether it's a steel or plastic tank.
CAVEAT EMPTOR: REPRODUCTION SENDING UNITS? = NOT!! > >
> > Some of the aftermarket suppliers (like the outfit in Kansas) are buying fuel senders from Ford and listing them in their catalogs.
The price is usually 20-30% ABOVE the Ford suggested retail price (MSRP).
WHY pay that price if the senders are available from Ford?
You can buy them from ftepartsguy.com at 25% OFF MSRP!!
Post Fiend
Joined: Jul 2004
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From: Northern California
Freshman User
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if its a 6 port type valve, your return lines could be in the wrong order. so the gas thats supposed to be returned to the rear tank is actually being sent to the front tank causing it to overflow
Post Fiend
Joined: Jul 2004
Posts: 8,786
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From: Northern California
so the gas thats supposed to be returned to the rear tank is actually being sent to the front tank causing it to overflow
New User
Joined: Sep 2009
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hi i have a 1981 ford f150 with dual gas tanks it is a 302 engine 4 wheel drive and one day i switched to the back gas tank and know its stuck on the back tank how do i switch it back to the front tank the switch wont work.