its bucking

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  • evoDRichie
    E30 Mastermind
    • Jan 2010
    • 1743

    #1

    its bucking

    ok so tonight my car was bucking at higher rpms, so found that my crank sensor wasn't tightened down all the way so i tighten it down and now it bucks bad all thru the gears above 1k. its a obd1 swap anyone else had this problem, is it just a bad sensor? up until this it has been no problems for 5 months... any help would be appreciated
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    Who`s attention, and why do I have to pay them?
  • greyis89
    Wrencher
    • Jun 2009
    • 230

    #2
    By bucking I'm only going off what happened to me, if touchy and stumbling in and out of throttle. For me it was a bad mass air flow meter with some small vacume leaks.
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    • evoDRichie
      E30 Mastermind
      • Jan 2010
      • 1743

      #3
      like i hit the throttle and it literally bucks hard with no power just until its floored then it pulls hard
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      • semaj4712
        No R3VLimiter
        • Mar 2012
        • 3069

        #4
        X2 on MAF that would be my guess

        29 Model A // 55 GMC 100 // 66 C10 // 72 BMW 2002 2.7 M20 Turbo // 75 CB500T Custom // 04 BMW M3 // 13 BMW 328i Sport

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        • evoDRichie
          E30 Mastermind
          • Jan 2010
          • 1743

          #5
          hmm the maf is a new one but its non OEM so idk, ill check on that then also...
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          • 7pilot
            E30 Addict
            • Feb 2009
            • 475

            #6
            It is not getting enough fuel.

            m

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            • evoDRichie
              E30 Mastermind
              • Jan 2010
              • 1743

              #7
              deff the MAF i unplug it and it runs fine... better actually than it did before... now my new question is it ok to drive with no maf?
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              • evoDRichie
                E30 Mastermind
                • Jan 2010
                • 1743

                #8
                for now that is im not gonna mess something else up with it unplugged am i ?
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                • evoDRichie
                  E30 Mastermind
                  • Jan 2010
                  • 1743

                  #9
                  and now im looking for a 540 maf anyone got one?
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                  Who`s attention, and why do I have to pay them?

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                  • DÌEGØ
                    Mod Crazy
                    • Feb 2010
                    • 690

                    #10
                    I wouldn't drive w/o it more than 100mi.
                    Just get a new one asap
                    Driving:1990 325iS, 2007 335i :devil:
                    past BMWs: 1987 325iS turbo, 1989 325i, 1995 525i, 2000 328CI, 2001 540i, 2008 135i

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                    • iceman
                      Advanced Member
                      • Jan 2011
                      • 149

                      #11
                      If you have a 403 ecu, make sure the 540 MAF will work. I don't think you can do it.

                      Once it warms up does your problem go away? Try unplugging your throttle pos. and cleaning your icv and see what happens.

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