The plot thickens!! Went to turn the car on this morning and in my haste didn't turn the key for long enough so it didn't start. Turned key back off then turned it over again. Car started first time but the engine managment light has gone off! Warmed the car up then gave it a thrash onto the motorway (usually turns ESP/Hill Holder/ASR off if under high boost) Car still feels a bit lumpy between 2-3k revs (like i am driving into a gusty headwind) but at 3k revs it goes like a rocket! I'll have a proper drive home tonight and take it upto 5-6k revs and see what happens. She needs filling up soon to so i will run the tank low and put in some V-Power 99 stuff?