S3 down on power

[Bigandbald]

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!

 

[vivalacoulter]

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.

 

[vivalacoulter]

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.