thats what i thought aswell.

I just been out again and her running again. Removed all 4 plugs again, they are all black sooty coated.
However no 3 is still the dud one, and while it was running i pulled the leads off no 1/ no 2 and no 4 and they all made it run very poorly. But when i tried with no 3 again it made no difference at all to the running of the car

sound like where getting somewhere peeps?

cheers again