Audi S3 Poor Idle

mephisto

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Seems to have started around replacing battery but could be red herring.

Idle from cold is fine, soon as im driving 10mins it's starting to play up. Revving up to 1.5/2k then dropping back to 1 sometimes just under with a slight splutter. This happens constantly, well about a pause of a second or so before it goes again. Makes me sound like a rookie driver as im parking anywhere!

State of car is Revo Stage 1 with CIA but that's been on ages. Also just come out of a service from local garage who said 'yeah it seems fine now Ive just reset the throttle calibration'. When in reality it's the same. Before I take it back down, any help or pointers appreciated. Could this be MAF?
 
Another possibility,assuming you've checked the PCV,is the throttle body itself.

Mine had similar issues last year,with uneven idling,and poor cold starting,and excessive fuelling etc,and eventually after logging it against another car,the TB load correction factor was found to be way out.....replaced the offender,and it's been fine since.

I'd go for the usual causes like PCV first though.
 
Awesome cheers, I just googled to find this




Almost identical symptoms to mine if anything mine is revving higher but very similar, thanks will check PCV.