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sputtering when flooring it

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    sputtering when flooring it

    My M30 engine sputters (like backfires) when i give it gas when accelerating hard. Is this normal?

    I have 19# injectors in it, but havent installed my dinan chip yet


    Why is my engine sputtering on acceleration?
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    #2
    Is it too much fuel?

    Or is the timing off ??
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      #3
      Sounds like too much fuel to me - is your O2 good?
      - Sean Hayes

      Comment


        #4
        I don't think it's the 02 sensor...

        Could it be that i put bigger injectors in it? maybe causing flooding and misfires.. bc it doesn't happen on full throttle.... ONLY WHEN CRUISING OR EASILY ACCELERATING
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          #5
          I doubt it's the bigger injectors. I've run bigger injectors for years and never experienced any negative side effects.

          could it be a bad AFM?
          Build thread

          Bimmerlabs

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            #6
            How can i troubleshoot it... any trix?
            Recent Rebranding!!
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              #7
              I had an exhaust leak at the headers... After putting new exhaust gaskets between the headers and the downpipes, i had no gurgling sound on deceleration and no backfiring anymore. Sounds great now!
              Recent Rebranding!!
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              E30 SM62/S62
              E30 M60 V8
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