i own a mk6 rs2k which seems to be running rich. its is standard apart from a full magnex with de-cat and a k&n induction kit. when the car is idling the smell of petrol is present from the exhaust. ive been told that people can smell it when i drive past to. it doesnt seem to matter if the car is cold or hot its stiil there. there doesnt seem to be any leaks. could this be down to a dodgy lamda sensor? if not what else could it be? thanx in advance