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S3 down on power

Discussion in 'A3/S3 Forum (8L Chassis)' started by Bigandbald, Sep 9, 2013.

  1. Bigandbald
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    Bigandbald Member

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    Help, I can't diagnose this but suspect vacuum/boost leak or MAF failure.

    since fitting my S2000 filter the car bogs down under 2k revs, and has a noticeable lack of power in the higher gears. Just seems to take ages to get from 80-100mph (private road of course)

    any ideas? I guess I need vag com to do logs etc but don't have it!
    #1
  2. vivalacoulter
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    vivalacoulter Member

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    Try unplugging the maf sensor. Doing so allows the car to use default values, if it's better with the default, then the sensor is naffed and you'll need a new one. Another new OEM maf is the best replacement.
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  3. vivalacoulter
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    vivalacoulter Member

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    If there's no difference then you'll need to take the car for a smoke leak test which is the best way to find a boost leak.
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