Re: Bad Powerpack ?
No spark on one bank does sound like a powerpack. I had one go bad on my 1975 V-4 years ago, which only had 1 pack for whole motor. Symptom was no spark on 1 cyl; initially thought it was a coil but swapping coils didn't fix it. If I put in a fresh plug in that cyl, it would run fine until I came off plane, and then it would foul that plug again. Eventually lost spark on both cyls on that bank; changing power pack fixed it.
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