Compression check as follows:
Left bank, front to rear = 200, 200, 202, 222
Right bank, front to rear = 200, 210, 204, 212
Engine was up to temp when I did the compression check, throttle was wide open, cycled each cylinder thru 12 compression cycles.
I did a leakdown test on the 222 psi cylinder - with 98 psi reference pressure, leakdown pressure was 97.5 psi.
I think it is an electrical problem - the plug is not firing. Any suggestions on how to check this out?