This is my first post so I hope its in the right section.
I recently aquired a 2006 A3 S-line 2.0 TFSI. I've been enjoying it up til now, as it has developed a problem when idling.
Sometimes it idles ok, but when its doesnt - it will either sit around normal idling revs but 'miss'. Or it will slowly climb the revs anywhere up til 2k, drop back down again and repeat.
It drives fine under load and seems to boost ok. Problem is only evident when idling. I havent seen a noticeable difference in MPG.
I'm concerned however that it may not be fuelling perfectly due to this problem and don't want to do any harm to the engine.
The EML is not lighting up.
Can anyone tell me what the problem is, going by what I've stated? Its a 'BWA' engine code.