New fuel pump & filter car won't start pls someone help !!!

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  • e30wavee
    Noobie
    • Jun 2012
    • 36

    #1

    New fuel pump & filter car won't start pls someone help !!!

    Someone help I'm going crazy trying to Figure this out. 1990 325i i installed new fuel pump with a new fuel filter,new plugs & the timing belt was done 30k ago.fuel relay are in working order. I loosen the hose to the fuel pressure regulator seem to be no fuel. Sprayed some starter fluid car started just for a few seconds.no fuel pressure what could cause this ?? Pumps working perfectly fine. Veteran rev's any suggestions
  • 3vilE30
    Grease Monkey
    • Jan 2013
    • 344

    #2
    Did you make sure the arrow on the fuel filter was hooked up to the line going toward the engine?

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    • Bullhead
      E30 Addict
      • Sep 2014
      • 532

      #3
      ^ This
      You will get no go juice if it's backwards, and if you did a universal pump make sure it's not wired in reverse because the pump will try to run in reverse as well.
      sigpic87 325E The Honey Badger

      Comment

      • Daeldalus
        Grease Monkey
        • Nov 2012
        • 304

        #4
        I had a problem last year where a brand new pump would not work.
        i could take a look and then it would work for a few weeks then mess up again

        ended up being a bad fuel pump plug. some dielectric grease and a zip tie to hold it
        together ended up fixing the problem.

        moral of the story is that those plugs are fragile and break all the time especially
        when putting in a new pump.

        Comment

        • e30wavee
          Noobie
          • Jun 2012
          • 36

          #5
          Fuel filter is installed correct arrow is connected to the line going to the engine and I checked fuel pump plugs they plugged up snug tight clean them up a bit.One other thing I also checked was I unplugged the lines on the fuel rail and regulator cracked the motor no fuel?? Idk what's going on

          Comment

          • E30NJ
            E30 Modder
            • Aug 2013
            • 921

            #6
            I'd check if you have the pump lines running the correct way, also are you getting pressure to the fuel rail?

            Comment

            • e30wavee
              Noobie
              • Jun 2012
              • 36

              #7
              No pressure at all, but there's two pumps underneath the back seat I changed the one on the right hand side of the car,but I also check the voltage for the pump on the left side and result were well I still deciding on changing this pump also this is really becoming a nightmare.

              Comment

              • Bullhead
                E30 Addict
                • Sep 2014
                • 532

                #8
                Your main pump is the one on the rear firewall that's not in the tank. The pump in the tank is just a "lift" pump.
                sigpic87 325E The Honey Badger

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