Ok guys cheers for that, supose i need more checks doin! Racing a focus st the other day and engine managment light came on, then it started missing ans spluttering, took her to the garage got vagcom plugged in and it turns out i needed a new coilpack on cylinder 4, after doin that started her back up and it burnt a spark plug out. Put 4 new plugs in and it seems to be running fine now, apart from the smoke!!!