Question about 1988 Ford F 150

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Fuel gauge stuck on full

Hi im trying to find some info how to fix my fuel gauge in a 1988 ford F 150 duel tank. the gauge is stuck on full and it's annoying not to know how much gas i have, does anyone have a solution.

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  • Anonymous Mar 12, 2014

    gas gauge is stuck on full and speedometer gauge is stuck at 30mph

  • Anonymous Mar 19, 2014

    trying to figure out how to take the gas tank off. which tools do I use and how do I check the float? my gas gauge is stuck on E and I have no idea how much gas I have

  • Anonymous Mar 31, 2014

    fuel gauge stuck on full

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Need to replace the sending unit

Posted on Sep 19, 2008

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1 Answer

Fuel gauge does not work always says full


check wire from sending unit on tank. If it has any bare wire that is touching metal and grounding out, this will cause the gauge to peg on full. If the wire on the tank sending unit looks good then more than likely, the gauge in the dash is bad.

Aug 26, 2010 | 1988 Ford F 150

1 Answer

1988 ford f150, was running fine, shut off at gas station now won't start, can here fuel pumps running


Do you have duel tanks or singel tank? it is possible the fuel filter is plugged. Thats the first thing I would check You could also remove the air cleaner and have someone crank it over and being careful not getting into the belts and fan open the plate in the throttle body and see if fuel is comming out of the injectors. If the fuel does not come out the injectors try replaceing the filter first.

Apr 23, 2010 | 1988 Ford F 150

1 Answer

Fuel gauge not working on my 1988 ford f159


It is most likely the sending unit in the fuel tank,but,check it first,if you unplug the connector to the fuel tank,the gauge should go past full.If you use a test light,and ground the clip on the end of the test light to a good,known,ground,and touch the right wire,it will light up dim(test light)and the gauge will pull down slow,to ,past the empty mark on the gauge,if it does this,the sending unit is bad,if it does not respond to any of this testing,then the gauge,or a connection to the gauge is bad.

Jan 19, 2010 | 1988 Ford F 150

1 Answer

Well i have a f150 ford truck 4x4 duel tank i have been having tr


in driver side of frame before the high pressure pump or lift pump.

Sep 04, 2009 | 1987 Ford F 150

1 Answer

Not getting fuel to injecters


you have a tank switching valve under the truck that may be bad,also check the fuel lines coming out of the tank they could be cracked and sucking air instead of fuel

Apr 29, 2009 | Ford F-150 Cars & Trucks

1 Answer

Fuel gauge not working


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.

Mar 31, 2009 | 1988 Ford F 150

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

1 Answer

I have a 1988 F-150 p/u with dual tanks.fuel gauge on both tanks do not work. one reads below empty all the time the other reads above full all the time.


i have the same problem and i replaced the shuttle valve and i fixed the problem it is located on the drivers side frame rail just behind the the main high pressure fuel pump it should have 6 lines going into it and out it is a mechanical part so its not repairiable hope this helps

Jul 20, 2008 | 1988 Ford F 150

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