ok so was driving down ma local b road with a fairly low tank of petrol all bin driving around abit today, as was driving the car kinda felt slugish so put ma foot down n it kinda juddered asif it cut and went again. so i took it for a long run n since then its perked up alot and put some more ultimate in it and runing near back to normal. what could it be ? miss fire ? dodgy plug? nothing wrong with the turbo no smoke or nefin. or is it fuel cut? sorry im not clued up on this subject as many are lol any help be good thanks marcus