Question about 1991 Ford F150

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My fuel pump is not working right i took the line apart at the filter and then with the key in the on poistion unpluged the relay switch and pluged it back in to start the fuel pump the pump comes on every time but gas does'nt come out every time should gas come out with high pressure every time?????

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  • melopel Feb 19, 2009

    the pump is working with the key in the on poistion like it should i thought it was the relay switch so i got a new one the pump runs but gas dont come out of the line sometimes when its running

  • yadayada
    yadayada May 11, 2010

    is the pump in the fuel tank working?, this pump requirs what i called a low pressure lift pump, later trucks used just one pump in the tank

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Yes fuel should come out when the pump is running. There is a little sock or filter at the end of the pick up tube in the fuel tank that feeds the fuel pump. This screen is very fine to filter out small particles. This sock is probably plugged up. To fix you will need to drop the fuel tank remove the sock and then clean out the debris from the tank. Even though the gas stations run filters off their pumps you still get floaters in your tank from the gas stations and if you tend to run your tank low always your sock will plug up eventually. If you turn the vehicle off it may restart again until the sock plugs again and then shut down.

Posted on Feb 19, 2009

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