Fuel trim issues! Whats going on??

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  • e30forlife
    E30 Addict
    • Mar 2012
    • 583
    #1

    Fuel trim issues! Whats going on??

    So I got my tune back from TRM to remove the VSS and delete the unnecessary codes. Car now redlines at 7k blah blah.

    But I thought it had been running rough and seems like its trying to find an idle.

    Hooked up the obd2 scanner and ran Live Data. I have two codes for Fuel trim bank 1 and fuel trim bank 2. The first time I had a code for Cylinder 6 misfire but havent had that come up again.

    My Live Data says Bank 1 is -28 and bank 2 is +28... Wasnt sure If my o2 sensors were plugged up right so I switched them and cleared the codes. Still same issue but the numbers switch..

    Im stumped and went through 8 canes of break cleaner..Most recent work done was replace CCV and fuel filter on Sunday...

    Thoughts?
    91 318 s52 Swap

    -m50 manifold
    -headers
    -zf320
    -3.25lsd
    -KaMotors Intake
    Tags: None
    • 328ijunkie
      Forum Sponsor
      • May 2007
      • 3961
      #2
      Your O2 sensor wiring is switched...

      Check Us out on Facebook
      Needing a harness adapter or wiring help? Check it out: also have 24v motor mounts, E30 M3 covers and E36 ECU mounts!
      Full Product Line Tuning
      OBD2 Tuning Available! OBD2 E36, S54 Swap, S62 Swap, etc: tuning@MarkertMotorWorks.com Dyno Thread

        Comment

        • e30forlife
          E30 Addict
          • Mar 2012
          • 583
          #3
          I switched them. Same issue though. ..

          Sent from my SAMSUNG-SM-N900A using Tapatalk
          91 318 s52 Swap

          -m50 manifold
          -headers
          -zf320
          -3.25lsd
          -KaMotors Intake

            Comment

            • 328ijunkie
              Forum Sponsor
              • May 2007
              • 3961
              #4
              Switched the plugs or their locations or what?
              Typically when i see them go extreme opposite like that then bank 1 is reading out of bank 2 and vise versa.

              Check Us out on Facebook
              Needing a harness adapter or wiring help? Check it out: also have 24v motor mounts, E30 M3 covers and E36 ECU mounts!
              Full Product Line Tuning
              OBD2 Tuning Available! OBD2 E36, S54 Swap, S62 Swap, etc: tuning@MarkertMotorWorks.com Dyno Thread

                Comment

                • e30forlife
                  E30 Addict
                  • Mar 2012
                  • 583
                  #5
                  Switched plugs on top of engine.

                  Sent from my SAMSUNG-SM-N900A using Tapatalk
                  91 318 s52 Swap

                  -m50 manifold
                  -headers
                  -zf320
                  -3.25lsd
                  -KaMotors Intake

                    Comment

                    • e30forlife
                      E30 Addict
                      • Mar 2012
                      • 583
                      #6
                      Do I have to reset adaptuins.

                      Sent from my SAMSUNG-SM-N900A using Tapatalk
                      91 318 s52 Swap

                      -m50 manifold
                      -headers
                      -zf320
                      -3.25lsd
                      -KaMotors Intake

                        Comment

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