Did built seta swap and now wouldn't rev past 2k without bogging

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  • DTMbimmer07
    E30 Fanatic
    • Mar 2009
    • 1485

    #1

    Did built seta swap and now wouldn't rev past 2k without bogging

    Just swapped in my new built seta into my e30, and now the car doesn't want to rev past 2k. The second it hits 2k it bogs down to about 1-1.5k then comes back to life. The car already has a new cps, tps, cap and rotor, high performance spark plug wires, new spark plugs. all seals on the motor are brand new. running out of ideas of what it could be, does anyone have any suggestions?

  • jlevie
    R3V OG
    • Nov 2006
    • 13530

    #2
    Check the rail fuel pressure while driving the car. My other suspicion would be a bad AM.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

    Comment

    • DTMbimmer07
      E30 Fanatic
      • Mar 2009
      • 1485

      #3
      AM? fuel pressure should be fine its the same fuel rail and pressure regulator i used from my old motor. ill check that though. I'm about to order a aeromotive 240 fuel pump right now as well.

      Comment

      • DTMbimmer07
        E30 Fanatic
        • Mar 2009
        • 1485

        #4
        Anyone else have any ideas??

        Comment

        • nando
          Moderator
          • Nov 2003
          • 34827

          #5
          I think he meant AFM

          why would you blow $200 on a fuel pump if you don't even know what the problem is?
          Build thread

          Bimmerlabs

          Comment

          • MR 325
            Moderator
            • Oct 2003
            • 37825

            #6
            Everything "should" be fine, sure. How about actually testing the fuel pressure?

            Which engine is the fuel pressure regulator from? Make sure you have the 3 bar regulator from a M20B25.
            BimmerHeads
            Classic BMW Specialists
            Santa Clarita, CA

            www.BimmerHeads.com

            Comment

            • DTMbimmer07
              E30 Fanatic
              • Mar 2009
              • 1485

              #7
              Originally posted by nando
              I think he meant AFM

              why would you blow $200 on a fuel pump if you don't even know what the problem is?
              Because I'm turboing the motor shortly anyways.

              Comment

              • DTMbimmer07
                E30 Fanatic
                • Mar 2009
                • 1485

                #8
                Its the original one from my m20b25. Only difference is I'm running 19lbs injectors. I swapped back to stock injectors to see if that was the problem but it's not.

                Comment

                • DTMbimmer07
                  E30 Fanatic
                  • Mar 2009
                  • 1485

                  #9
                  Anyone else have any ideas?

                  Comment

                  • DTMbimmer07
                    E30 Fanatic
                    • Mar 2009
                    • 1485

                    #10
                    swaped out the afm yesterday still doing the same thing........ running out of ideas here.

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