So, i've got an erratic idle on my 2005 A4 DTM. Fairly regularly, when I come to a stop the revs rise to around 1200 then lowly falls back to 800 ish.
I've taken the car to a garage to fit coilovers recently and asked them to look at the problem They fixed a small boost leek and this cleared the engine management light.... after a day its now retuned.
Is there anything I should check before taking it back? I don't have a copy of vag-com so can't scan for the code, i'm just wondering if any ones had similar problems? I've seen a few threads suggesting that it could be a faulty PCV valve?
Any help much appreciated