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a4 2.4 v6 miss fire when warm

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by scanny1, Oct 24, 2012.

  1. scanny1
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    scanny1 New Member

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    [Oct 24, 2012]
    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
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  2. scanny1
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    scanny1 New Member

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    [Oct 25, 2012]
    any ideas ??
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  3. marktdisport
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    marktdisport Active Member

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    [Oct 25, 2012]
    Could it be a sticking valve ??
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  4. Greeny233
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    Greeny233 Active Member

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    [Oct 26, 2012]
    Could be a lambda sensor fault.
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