You're sure it's one coil per plug? If so, I am not sure why it would fire two at a time. Do you have a pic or part number for the coil pack?
Mr Mazza, The stock Ford coil on plug is the configuration. The coils are 'saturated' and then grounded to fire them. I used a MegaSquirt ECU which was setup in this fashion.
Oh. Coils on plugs then? Hmm, I don't know why that system would fire 2 at once. I know more about the waste spark systems with a single coil pack with paired plugs.
I've got a couple of dump truck loads of air cooled VW parts. Been trying to get rid of them for years. Nobody wants them.