Hi Dave,

Sorry, I've only just read your post today otherwise I would have responded sooner.

Having in a previous job spent a lot of time analysing Ford secondary ignition waveforms I was going to say that I thought the traces showed a shorting problem, so given that you had replaced coil and leads would only point to a plug issue.

Also as mentioned already you are seeing the Ford multi-strike / repetitive spark system in action. I have in the past seen the EDIS module create upto 4 spark events on each cylinder, albeit in lab conditions.

Cheers

Sean