electric fuel pump

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  • cousindave
    1st Gear
    • Jan 2007
    • 192

    electric fuel pump

    I've got a series III petrol. with electric fuel pump. Every so often i go to start it and i find it fuel starved. I have to disconnect the fuel line from the carb and siphon gas into the fuel line, reconnect and then she starts and runs no problem. Anyone knows what could cause this? Thanks
  • LaneRover
    Overdrive
    • Oct 2006
    • 1743

    #2
    Where is the pump in relation to the tank?

    Is it ever after it has been running (ie is it hot and thus it is vapor lock)
    1958 107 SW - Sold to a better home
    1965 109 SW - nearly running well
    1966 88 SW - running but needing attention
    1969 109 P-UP

    http://www.facebook.com/album.php?ai...2&l=64cfe23aa2

    Comment

    • cousindave
      1st Gear
      • Jan 2007
      • 192

      #3
      Only happens when cold. The pump is attachedto the footwell directly in front gas tank.

      Comment

      • LaneRover
        Overdrive
        • Oct 2006
        • 1743

        #4
        When this happens, has it sat longer than usual? Not sure if an electric pump has any sort of backflow preventer. If it does then could it be faulty? Not sure if the pump needs to be primed to pump if there is no fuel in it but that is what it sounds like right now.

        Brent
        1958 107 SW - Sold to a better home
        1965 109 SW - nearly running well
        1966 88 SW - running but needing attention
        1969 109 P-UP

        http://www.facebook.com/album.php?ai...2&l=64cfe23aa2

        Comment

        • msggunny
          5th Gear
          • Jan 2007
          • 621

          #5
          Back flow.

          I would check the pump too. What brand is it?

          I have a redline pump on mine and have never had any problems.

          I wonder why you would have to siphon the fuel though, the pump should pull fuel when its running regardless. (?)
          First but gone: 91 3 door Disco "White Rhino"
          77 Series III 88 ex MoD "Shongololo"
          Gone and I miss her: 97 D1 5 speed
          04 DII
          08 D3 (LR3)

          Comment

          • LaneRover
            Overdrive
            • Oct 2006
            • 1743

            #6
            Did you put the pump in or is it of an unknown age?
            1958 107 SW - Sold to a better home
            1965 109 SW - nearly running well
            1966 88 SW - running but needing attention
            1969 109 P-UP

            http://www.facebook.com/album.php?ai...2&l=64cfe23aa2

            Comment

            • Tim Smith
              Overdrive
              • Nov 2006
              • 1504

              #7
              I have to agree with the thought that it's not a self priming pump and maybe the back flow valve (if there is one in the pump) has given it's two week notice.

              Comment

              • cousindave
                1st Gear
                • Jan 2007
                • 192

                #8
                Definitely of unknown age, it looks like a facet(square body). Looks like time to get new pump. Anyone have any suggestions or recommendations?

                Comment

                • Terrys
                  Overdrive
                  • May 2007
                  • 1382

                  #9
                  Any of the 'square body' fuel pumps are solenoid type, and are noisy and vibrate like heel, and could pull a fart out of a flea. They are made to push.
                  I don't believe in running an electric, in line with a mechanical, but if you feel you, must, buy a good, quiet pump. Facet makes a copy of the Bendix, which was the best pump ever made and used by most race car people.
                  This is what you want for a carbed engine of LR size.

                  Truechoice Motorsports provides race car technology and parts

                  Comment

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