Hello, When I switch to the rear tank the gauge goes to past full, then drops to E. Even though I have it on the rear tank it keep drawing fuel from the front. I have switched the switch back and forth many times like suggested and it still does the same. Maybe once in awhile it will stay at 1/2 tank "guage" but continues to draw from the front. I have also banged on the fuel tank etc like suggested. The truck only has 64k miles on it. Any help would be great.. Thank you very much.
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Re: 1987 ford 150 rear fuel tank not working
Remove the fuel selector switch from the dash, you can test it with a simple $8.00 swing volt/ohm meter. Its probably bad. Note there is a valve switch under the drivers door jam that selects witch fuel line to use, that is the second place to look. Hope it works..
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I have a1987 F-150. The gas gauge for the rear tank always indicate that the tank is full when I know it is not. I try to put gas in but the tank won't let any gas in. Is there some type of sensors inside the tank that won't allow the tank to be filled or is this a guage problem?
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
well, first, to find out if its the in tank fuel pump or the tank selector valve, the cheapest and probable easiest thing to do is find the selector valve under the truck and switch the incoming fuel lines. front tank to rear tank inlet, and vice versa. If the truck still doesnt run, you either have an electrical delivery problem to the in tank fuel pump or a bad fuel pump. If after switching the lines, it does run, then you need a new selector valve
I have to say i'm only guessing, but it sounds like the valve that switches the flow of gas from one tank to the other must be sticking part way open, or bypassing or something, and anything your engine doesn't require, is being returned to the front tank, instead of the rear.
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.