Question about 1988 Ford F 150

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Fuel switch from front tank to rear works(according to gas gauge), but it doesn't switch tanks.

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  • 56 Answers

Thers a switch under the truck,check and see if you have fire to it.check fuses

Posted on Feb 03, 2010

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1 Answer

Why is gas shooting out of gas cap?


you have 2 options
1--- put the fuel return line into the tank you are using
2--- install a balance line between tank 1 and tank 2 so that the fuel back to tank1 is allowed to balance back into tank 2

properly set up the tanks should be connected so that the fuel gauge reads the total fuel in the tanks and there is a need for only one fuel pump

Nov 09, 2017 | 1990 Ford F150

2 Answers

Dual tank pickup. Fuel gauge doesn't work on either tank?


You just have a ground problem between the frame and tank ground. It has to be connected to a clean tab on the tank at the fuel sending unit. Check and clean them, both tanks. It gets confused and don't know what to do without a complete circuit.

Oct 03, 2017 | 1989 Ford F 150

2 Answers

1987 f150 302 the truck runs only on front tank, but it pumps the tank into the rear tank then the rear tank overflows and you run out of fuel in the front, need a cheap quick fix to get through until the...


it sounds like the switching valve is no good and needs replacing.you can clamp off the fuel hose to the rear tank and just run off the front tank until you can get it repaired.

Apr 10, 2011 | 1990 Ford F150

1 Answer

Just purchased a 97 chev 3500 series pu with dual fuel tanks. Don't know how to switch from front to rear tank. there is no switch


There is no switch. What you have is a "transfer pump" that moves fuel from the rear tank to the front tank as required, so that you get a smooth declining indication of fuel left on the gauge in the dash.

If the transfer pump goes bad, any fuel in the rear tank will not be pumped to the front tank so you'll only be running on the front tank.

The fuel level indicator is on the front tank, so the gauge will still accurately register the amount of fuel in the front tank.

Jan 09, 2011 | 1983 Chevrolet C1500

1 Answer

Front tank fuel gauge not working


If the gauge works on the rear tank but not the front, the problem is most likely the sending unit in the front tank. You will have to drop the tank to change it. I guess what I would do is, set your trip meter to zero when you fill the front tank. Then, run that tank to the point where the truck is starting to run out of gas and then switch to rear tank. Keep track of how far you can go on the front tank. Then when you refill the front tank reset the trip meter and switch tanks about 20 miles before you think it's going to run out. It's not a good idea to run those pumps dry. Just make sure you have gas in the rear tank. If you do decide to change the sending unit, run that front tank as empty as you can, also, I would change the pump too. In 92, I think the pump or the sending unit can be replaced seperately. The worst thing about changing those in tank fuel pumps is getting the gas out of the tank. No trip meter? Just write down the mileage from the odometer. Good luck.

Feb 06, 2010 | 1992 Ford F250

1 Answer

1987 fuel level guage issue 87 F150 Lariat XLT 5.0 2wd. Have a very similar situation. Front tank position shows empty even when I know there is gas. Rear tank position shows full after refilling but...


the gas is regulated from the switching valve you control off the dash. Check the valve to hear it switch
have a friend help you do this. it will be located under the truck between the two tanks. You may have a faultly valve or switch rattling inside changing the tanks setting also while driving which will be hard to tell

Jan 31, 2010 | 1987 Ford F 150

1 Answer

1996 ford f150 with two tanks. Truck has been running fine and normal til today. Wouldn't start, but when I switched tank from front to rear it started fine and ran fine.Any ideas?Thanks


You may have run out of gas in the front tank, but the gauge may have been reading the rear tank or the front sender is stuck. Is the fuel line switched electrically or manually controlled? How are the gauge connections switched?

Aug 14, 2009 | Ford F-150 Cars & Trucks

1 Answer

Fuel Tanks reversed , Gauge not reading?


The Ford trucks were recalled for the tank switch replacement. Somehow the switches would pump fuel from one tank to the other. This would cause the one tank to overflow and or result in a fire from hot exhaust temps coming into contact with the fuel. Check the dash tank switch. It is probably bad.

Mar 12, 2009 | 1985 Ford F 250

1 Answer

Dual tank only runs on one tank


there is an electric valve that switches from one tank to the other. it switches the gauge too. It is malfunctioning and pumping fuel from one tank to the other instead of the engine. I think there wa a recall for this. Call any Ford dealer and give him your 17 digit VIN # and they can check for open recalls. Recalls never expire and the dealer will repair for free if there is a recall.
good luck

Jan 08, 2009 | 1990 Ford F150

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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