Hey Jonesy,
In comparison to the other 3 the #2 spark was like a torch with a flat battery, it was dull, and there was the intermittent "popping" sound of a spark shorting out somewhere. I looked for it but could not find. When I grabbed the lead and held onto it the pulses were weak. (normally I cannot hold on for any lenght of time with a good one)
I'll stick another coil on and see what happens next.
Cheers
Eddy