Fuel Pump Puzzle
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This is a discussion on Fuel Pump Puzzle within the Everyday Impreza Talk forums, part of the Community - Meet other Enthusiasts category; Hello-- I have been having some issues with my 93 Impreza fuel pump running intermittently when I try to start ...

  1. #1
    Registered User
    Join Date
    Jan 2011

    Fuel Pump Puzzle


    I have been having some issues with my 93 Impreza fuel pump running intermittently when I try to start my car for quite some time now. It is not the relay and I have isolated the problem to the fuel pump and pump harnesses (I am getting voltage to harness that plugs into fuel tank). It has never once quit while driving but only seems to have issues on start up. I have the whole assembly out of the car and I'm trying to figure out what the problem is.

    Here's the tricky part that I don't understand:

    When I jump the fuel pump directly to the battery, it runs just fine. When I jump the appropriate wires in the wiring harness to the battery, I am getting 12 volts to the pump but it is not running. The first picture the pump runs fine, the second, I am getting 12 volts at the pump but it is not running.

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    I thought maybe I was losing amperage due to a bad connection but I tried cleaning everything and there does not appear to be any loose connections. I also re-did my splices in the wiring and soldered them (they were butt spliced before). Why is the pump not running!!!! It seems to me that if it is getting voltage it should run.......

    Any help would be appreciated!

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  3. #2
    Captain James of the SS Impreza has gone down with the ship Drews's Avatar
    Join Date
    Aug 2008
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    Swap with a known good fuel pump. That seems a lot easier than what you're doing now.
    Hawk-Eye Alliance #Eleventy,000,000,000|N.E.R.D. Member 20,000
    Stable: 2014 Hyundai Veloster Turbo (Matte Grey), 06 LGT, 98 RS, 16 Crosstrek

    Resident Clubdub Debbie Downer. I'd love your ideas if you kept them to yourself. Subarus suck, get a new wife.

    Never argue with idiots. They'll drag you to their level and beat you with experience.

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