[wilf leek]

Jack21 - see what I meant about posting late at night!!! I couldn't even tell the difference between a Ford and Chevy - shows how tired I was.

Buzz - if you pull the plug on the cylinder that you felt was making things bad, what colour is it? If it is black and "wet", then that cylinder is probably not firing. Let us know more when you have made sure of all the things everyone said above (ignore my Ford firing order and cylinder notation!). Lets hope it is just a spark lead problem, because that is going to be far easier to fix than a valve problem.