Hi. Thanks for replying. The car starts first time, ticks over quite tidy but you can tell it's slightly not right on tick over. You go up the road with it on low revs, put your foot down and it dies out on you. This problem just seems to have started, it was missing slightly and just seems to have got worse as time goes on.I altered the throttol sencor, the revs went up to round about 1500, the power came back and went again. If i adjust it by hand now it makes no difference. The leads i put on is a secondhand set but the original type and is normal sparkeplugs in it. Thanks