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More problems argghh!! misfiring on idle....

Discussion in 'A3/S3 Forum (8L Chassis)' started by will.f_1.8t, Oct 31, 2009.

  1. will.f_1.8t
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    will.f_1.8t Member

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    [Oct 31, 2009]
    After spending close to £2k in a year on repairs, i have yet another problem!
    On idle the revs are all over the place, but the car pulls and is normal over 2000rpm! i had it on vag-com which said its the 2 lambda sensors, spark plugs, all four coil packs and MAF!

    im hoping one fault has triggered all the other faults, if anyone else has experienced similiar problems and can could help, i would be soooooooo grateful.

    its an audi a3 1.8t, x reg

    cheers
    #1
  2. HTC
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    HTC Active Member

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    [Nov 1, 2009]
    Check for vacuum leaks. At the injectors and the pipes under the inlet manifold.
    #2
  3. Mehmet
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    Mehmet Member

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    [Nov 1, 2009]
    Air leak?
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  4. HTC
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    HTC Active Member

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    [Nov 2, 2009]
    Yes, an air leak on the induction side.
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  5. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Nov 2, 2009]
    look at block 001 lambda correction and 032/031 to see... if its adding fuel on idle its trying to compensate for an airleak
    #5
  6. will.f_1.8t
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    will.f_1.8t Member

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    [Nov 2, 2009]
    thanks for the replys, will check all connections and look for any cracks!
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  7. will.f_1.8t
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    will.f_1.8t Member

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    [Nov 2, 2009]
    After looking under the bonnet i have found a huge split on the engine breather/inlet pipe >

    [​IMG] anyone know where i can get a silicone hose to replace this, forge/samco do not seem to do them cheers will
    #7
  8. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Nov 2, 2009]
    good find.
    common part to fail and go soft/mushy
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