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S3 Miss Fire...Finally took it to a VAG specialist

Tekin Jun 21, 2008

  1. Tekin

    Tekin Member

    As some of you may already know my S3 has been misfiring lately. I changed the coil packs and spark plugs (common problems), it stopped miss firing but then came back. This didn't solve the problem.:uhm:

    Took it into a mechanic today they stuck the vag com in and found the faults that we already know about e.g. misfiring cylinders disconnected MAF disconnected injectors etc etc so they just reseted it.

    We checked the spark plugs again, it looked like 1 and 4 had never been used where as 2 and 3 were a bit black as in it had been sparking.

    They then went on to doing a compression test in the cylinders where the spark plugs live and found that all 4 were very low on compression.

    I have been advised to leave it there and they will perform some other checks, which is to check the timing belt which may be causing to run like how it is if that doesn't work then a compression leakage check.

    They told me the worst possible scenario might be that they may need to take the head off to discover faulty valves or a knackard cylinder head which may repairing or replacing.:( Could it be possible that valves 1 and 4 are gone thats why spark plugs 1 and 4 still look new?

    Hopefully its just a timing issue if not then maybe a valve or two has gone, if it needs a new cylinder head it can be very costly i am not looking forward to it if it is.

    Looks like i wont be able to up to gti international tomorrow but ill still going ill just jump in with one of my mates.

    I'll update you guys soon hopefully with some good news.

  2. voorhees

    voorhees Moderator Staff Member Moderator Team V8 Audi S5 s tronic

    Tek look out for me I'll show you the wheel and have a chat about this problem,big ugly bloke with S3 in the fastest colour
  3. jamieface

    jamieface the only S3 in the villiage

    Good luck with the car mate hope all is well and your not gonna be out of pocket too much :icon_thumright:
  4. simch

    simch Active Member

    If timing belt was out it shoold throw a fault code.
  5. Tekin

    Tekin Member

    The car is sorted now. Two pipes were replaced which were slit, wish i spotted them earlier but they were in a hard to reach place.

  6. s3_tny

    s3_tny Member

    glad its all sorted now mate

    atleast you can go and enjoy your S3 ownership properly now :thumbsup:
  7. S3Steve

    S3Steve Active Member

    Glad to hear you finally got it sorted mate.

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