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a4 2.4 v6 miss fire when warm

scanny1 Oct 24, 2012

  1. scanny1

    scanny1 New Member

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    i have a a4 2.4 v6 audi 2002 which has developed a miss fire it happens when the engine is hot,ive replaced spark plugs ,ht leads ,coils .and its still the same .but for a while before i had the engine management light come on a few times saying catalyst below threshold.would the cats cause this to happen if they have gone
     
  2. scanny1

    scanny1 New Member

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    any ideas ??
     
  3. marktdisport

    marktdisport Active Member

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    Could it be a sticking valve ??
     
  4. Greeny233

    Greeny233 It's all about the V8. Team V8 Team Silver Audi S4 Audi Avant Owner Group

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    Could be a lambda sensor fault.
     

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