Question about 1984 Ford F 150

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Fuel tank 1994 ford f150 change rear fuel tank after changeing tank the front pump does't work and it put fuel in the rear tank, fuel gage go to empty when key is on. turn key off than fuel gage works.

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Ok look for a desconected or not installed negative, wire in the work area you was working

Posted on Nov 19, 2008

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3 Answers

1991 ford f150 fuel problem


Is it possible the fuel hoses are not hooked up right ? If you only changed the rear pump and the lines are correct, its possible the new pump damaged the check valve in the front pump. The valve could have been about to fail before replacing the rear pump.
You may be able to block the line going into the front tank and run the truck from just the rear tank.

Feb 16, 2014 | 1991 Ford F150

1 Answer

Fuel gage not working


when i had my 91 ford, the front tank gauge woul not work, but the back one did. i discovered that the wire plug on top of the tank had deteriorated and losing connection. if you change that, it may help it start working again.

Jan 22, 2013 | 1991 Ford F150

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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?


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

Nov 12, 2010 | 1994 Ford F150 Styleside Supercab

1 Answer

1987 ford f150 dual fuel tanks fuel qty gages inop.fwd tank reads empty and when aft selected reads full.


tank switch on dash could be bad, also selector valve could be bad. are the fuel gauges accurate front or rear. like you say the rear reads full, is it?? I would try the switch on the dash first.

Sep 17, 2009 | 1987 Ford F 150

1 Answer

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

I have a 1991 Ford F150 4 x 4 inline 6 4.6L. Dual


your truck is a 4.9L, make sure you have power to the front tank fuel pump. is the power to the pump is ok and you can hear the pump run for a second or two when you key the vehicle on... replace the fuel tank selector valve

Apr 17, 2009 | 1991 Ford F150

1 Answer

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.

Apr 09, 2009 | 1994 Ford F150 Styleside Supercab

2 Answers

1995 ford f150 fuel pump


Your truck is fuel injected. On the fuel delivery rail in the engine compartment there is a cap you can take off to check for fuel pressure. Hook a mechanical gage to it and check to make sure the fuel pump is working. Also if you have a dash switch to change over to the different tanks check it. Often these switches become bad and the fuel will not flow. The switches are about $ 40.00 dollars. To replace the fuel pumps you must drop the fuel tanks and remove each fuel pump from the tank. The cost for the pumps alone will be about $300.00 to $ 500.00 depending on who you purchase them from. The universals are cheaper, but the Ford pumps are an exact match and you can change them with out any problems.

Feb 08, 2009 | 1995 Ford F150 Styleside Regular Cab

1 Answer

Fuel Gauge not working


The switch that you use to change tanks is probably faulty - the switch supplies power for the sending unit in the tank, and to the transfer switch for the gas lines - use a meter to check it

Nov 27, 2008 | 1984 Ford F 150

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