Question about 1991 Ford F150

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1991 Ford F-150 Oild pressure sending unit

I'm trying to replace the sending unit, and I got the old one off using a 1 1/16 socket, but its not working to put the new one back on.

Any suggestions?

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  • c_b_cottrell Apr 24, 2009

    well my problem was that i had a 12pt socket but needed a 6 pt.

    Now, I am having problem getting it completely flush with the block. Im have to put lots of pressure... is that normal?



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You will need an extension coupler,most of them had them,especially in a 4x4

Posted on Apr 23, 2009


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  • Floor jack and 2 jack stands
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Steps to replace fuel pump:
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  • Start the engine and let it idle until it stalls. Then crank the engine for about 5 seconds to relieve the remaining fuel pressure from the system. If the engine does not start due to a bad fuel pump, crank the engine to make sure fuel pressure is relieved.
  • Turn the ignition key to the Off position.
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  • Remove the tank shield if your particular model is equipped with it using a ratchet, ratchet extension and socket.
  • Support the fuel tank with the floor jack.
  • Disconnect the straps holding the tank to the truck's body using the ratchet, ratchet extension and socket.
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  • Disconnect the fuel lines and vapor lines from the sending unit/pump module. Press the lock tabs on the lines quick connectors and carefully pull the lines from their fittings. Then unplug the pump-module electrical connector.
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  • Lift the sending unit/pump module off the tank carefully and discard the O-ring seal underneath the flange of the module.

    Install the Fuel Pump
  • Remove the old fuel pump from the module using a screwdriver and a pair of slip joint pliers and install the new pump on the module.
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  • Install the sending unit/pump module in the tank and turn the lock ring clockwise using the fuel tank sending unit wrench.
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  • Lower your F-150..
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