Hi guys, ive searched this forum back cant find anyone with a similiar prob, so if anyone can help ?..just bought my first audi n love it!however, it has a miss - ie when taken over 4000 rev it coughs and continues to misfire especially at lower revs/speed - it can be revved thru 4000 and its as if a turbo kicks in - it releases power n feels great but dropping back down it begins to misfire badly; just spent 600 on custom stainles exhaust as the old one blew up - back box literally blew a hole out so excess unburnt fuel getting thru ...anywhere in scotland i can have it looked at ?...