Not too long ago i brought a a3 2.0 fsi sport, about a week after i got the car i noticed that the revs never quite settle down its always fluttering about, not so much to casue me problems but its getting quite annoying. Anyway, i was wondering has anyone else experienced this problem? i've been told it could be the idle control valve needs cleaning?? or the injectors are abit dirty in which case could redex be used? ( always been wary of engine additives especially in modern engines.) any help would be greatly apprieciated! thanks.