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urgent help, judder/missfire?

Discussion in 'A3/S3 Forum (8L Chassis)' started by brys3, Jul 20, 2010.

  1. brys3
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    brys3 Member

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    [Jul 20, 2010]
    hi, upon driving home i over took a focus rs then as i continued to plant my foot over 3000rpm it started to judder or missfire. i tried this in ever gear and is fine upto 3000 then starts to judder. i tried slow acceleration and was fine. any ideas? please help
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  2. finny_quattro
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    finny_quattro Member

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    [Jul 20, 2010]
    crank sensor mate....might be wrong but i changed maf lambda then crank and it was that
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  3. Sandip
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    Sandip Well-Known Member

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    [Jul 20, 2010]
    I'd sway towards coilpack and plugs
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  4. brys3
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    brys3 Member

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    [Jul 20, 2010]
    i was thinking coil pack, ive had a similar judder previous which ended up being the gap on the plugs but it was no where near as harsh and was at various rpms depending on boost.
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  5. brys3
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    brys3 Member

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    [Jul 20, 2010]
    oh and ive just the codes. ive got 17863 and 17864
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  6. Sandip
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    Sandip Well-Known Member

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    [Jul 20, 2010]
    Those codes are pointing at Lambda, they might of popped up because your cars been firing on 3 cylinders
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  7. sportstractor
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    sportstractor Chugger

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    [Jul 20, 2010]
    ha mine started doing the same yesterday. definately down to plugs or coil pack as its load dependant.
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