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    Results 1 to 2 of 2
    1. #1
      Join Date
      Nov 2009
      Location
      Austin Texas
      Posts
      641

      A/F jumping at idle

      Im having an issue with my A/F jumping all over the place at idle. I though it could be an exhaust leak but I am not seeing anything. Could it be a had injector and when this cyl fires it causes a lean spike?



    2. #2
      Join Date
      Apr 2001
      Location
      Central CA USA
      Posts
      6,108
      Country Flag: United States
      Or a spark plug misfire. It can happen at idle with a lean mixture. Look at your TPS signal stability at idle. If TPS varies, the ECM will react as if the throttle is being opened quickly & add acceleration enrichment.
      67 Camaro RS that will be faster than anything Mary owns.



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