Ok finished stint at work so decided to try bee utey's ignition module idea last night. Got it all wired up and back into car. Tried to start and no spark at all.... mmmmmm wires around the wrong way couldnt be... pulled all out again and yep wotta dunce, lesson learnt dont work on cars after a week of 12 hour shifts. So it started up last night but thought I'd wait to test drive in the morning. Have now done that and still the same problem. Runs perfect until warm up then missing and crawling like its running on 3 cylinders not 8 . Parked up again and noticed a spot of coolant on the floor, traced it back to behind the timing cover on passenger side. Dont know if thats related or not but thats where its at now. Unsure of what else to try without stripping it down.