Question about 1991 Ford F150

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1991 ford f150 fuel problem

I changed out rear pump and now it is filling front tank with fuel now the front pump is bad. it did not do this before. i changed the pump because of noise and a stalling problem with tuck

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  • Ford Master
  • 803 Answers

It may have been failing initially, try replacing it and recheck.

Posted on Feb 17, 2014

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  • Expert
  • 85 Answers

Fuel lines incorrect at splitter. or defectine tank switch.

Posted on Feb 17, 2014

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  • Ford Master
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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.

Posted on Feb 17, 2014

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Posted on Jan 02, 2017

  • 122 Answers

SOURCE: 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

Posted on Nov 27, 2008

  • 7 Answers

SOURCE: 1991 ford f150 no noise from fuel pump and truck will not start

get a code reader like the Actron CP9015 Code Scanner, 20 dollars and will flash codes. if it will not diagnose itself, the ecm must be replaced. this fixed my dads truck with the same problem

Posted on Nov 28, 2008

warlock61
  • 659 Answers

SOURCE: Ford Dual Gas Tank problem, Rear tank Always full.

This is a common problem. On the driver's side frame rail is a large black plastic assembly that the fuel lines connect to. This a fuel switching valve what usually happens is the valve goes bad and the fuel gets pumped from one tank to the other

Posted on Dec 09, 2008

  • 1 Answer

SOURCE: 1995 ford f150 fuel pump

truck doesn;t start it mite be the fuel pump or relay switch

Posted on Feb 16, 2009

  • 1 Answer

SOURCE: when I switch from my front fuel tank to my rear tank gas stops

There is no selector valve on a 1995 ford f150 300 engine. The selector switch on the dash sends power to the pump in the selected tank. The pump then sends fuel to the engine. If engine won't run on the selected switch, the pump in that tank needs replaced.

Posted on Oct 24, 2010

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Jul 16, 2010 | 1991 Ford F150

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Rear fuel pump 1991 F150 will not turn on,, front works ok,, rear pump does work,, dash switch has been changed,, what next??


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Apr 08, 2010 | 1991 Ford F150

1 Answer

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


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Apr 17, 2009 | 1991 Ford F150

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

1995 ford f150 fuel pump


will it run off the rear tank?if you have power too the rear pump and the truck runs off it ,its prob a bad pump in the front tank,you need too drop the front tank and replace the pump

Jan 24, 2009 | 2004 Ford F150

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Ford Dual Gas Tank problem, Rear tank Always full.


This is a common problem. On the driver's side frame rail is a large black plastic assembly that the fuel lines connect to. This a fuel switching valve what usually happens is the valve goes bad and the fuel gets pumped from one tank to the other

Dec 09, 2008 | 1992 Ford F150 SuperCab

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