Question about 1994 Ford F150 Styleside Supercab

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I have a 1994 Ford F150 XLT with duel fuel tanks! I have a full tank in the front tank, but when hit the switch for that tank, the truck goes dead! What is the cause of this?

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Common on older high mileage fors to either have the switch go out or the intank pump go bad, you cang ground terminal 6 on the underhood diag plug with key on engine off and switch from front to rear or vice versa and listen for fuel pumps to be running, likely one is not

Posted on Jul 02, 2012

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If you determine that gas is not going from the front tank to the engine, then it could be due to a crimped line.

However, what was the engine size of this 1994 Ford F150 XLT with the dual fuel tanks?
Does it have electrical pumps in the tank, or does it have a mechanical pump at the engine or both?

When you hit the switch for that tank, is there a diverter valve with a mechanical fuel pump at the engine, or is there an electric fuel pump in each of the tanks that switches electrically with that flip of the switch?

Posted on Nov 12, 2010

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SOURCE: I have a 1994 Ford F150 XLT with duel fuel tanks!

it is hard to say for sure but thhe switch could be bad and the way every thing runs through the computer it turns off(so to speak)instead of smoking the computer.also check wireing undertruck on frame rail by front gas tank for a wore spot shorting out the system.hope this helps.

Posted on Nov 12, 2010

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1 Answer

I have a 1994 Ford F150 XLT with duel fuel tanks! I have a full tank in the front tank, but when hit the switch for that tank, the truck goes dead! What is the cause of this?


it is hard to say for sure but thhe switch could be bad and the way every thing runs through the computer it turns off(so to speak)instead of smoking the computer.also check wireing undertruck on frame rail by front gas tank for a wore spot shorting out the system.hope this helps.

Nov 12, 2010 | 1994 Ford F150 Styleside Supercab

2 Answers

I have a 95 ford f150 duel fuel tank and when i switch tanks i wants to die lik there is no gas in the other tank but it is full what could be the problom? im so lost


Check all filters. It sounds like there is a blockage in tank 2. The easiest way to check this is to take the line off and blow back through with a high pressure hose, but please put a new filter on when you do this, or you will be in the same position again. Let me know if you have any other probs, Dave

Nov 10, 2009 | 1995 Ford F150 Styleside Regular Cab

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I have just purchased 1995 ford xlt extende cab and i have a few questions for you. I have duel fuel tanks and both show full. However when i change from front tank to rear it starts to miss. What should I...


It Could Be That The Fuel Sending Unit For The Back Tanks Is Bad And Just Show You It Fuel When Its Really Empty Try putting A Little Gas In That Tank And See If Problem Still Persists On Not

Jul 11, 2009 | 1995 Ford F150 Styleside Regular Cab

1 Answer

1995 F150 (6 cyl) has duel tank fuel issue


To fix the problem you need to replace the switch valve on the frame rail. They shouldn't bleed into one another. When the system is working right they are independent and controlled by the switch on the dash.

May 23, 2009 | 1995 Ford F150 Styleside Regular Cab

1 Answer

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It sounds to me like you like you have a fuel pump problem in your front tank. I don't know what to tell you without knowing what engine is in your truck but that is what I would start to check first.

Apr 19, 2009 | 1995 Ford F150 Styleside Regular Cab

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On my 1994 f150. i have a problem with my fuel system. my truck has two fuel tanks a dash mounted elect. switch for switching tanks.my problem is that when i switch to rear tank the engine dies. but the...


first go to the fuel pumps electrical connections, switch the dash to the front tank and measure power, then to the rear tank, do you have power at both fuel pumps? if so the rear tank pump is bad

check the vent and return line pipes for a clog, it sounds like all return fuel is going to one tank.

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1 Answer

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yea fords with two tanks are known for getting stuck if you dont switch the tank constantly. you have to get to the valve that switches the two tanks, and free it up. it definitley isnt anything but the valve.

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