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Maybe I'm not following this, or there's something I don't understand. If the MS "+12v switched" wire, the coil and the distributor sensor are all powered from the key switch, then when the key switch is OFF, how would the coil receive power?

When the key is off, it is just that off, the coil should not be powered. In the MS world somehow there have been those that had power to the coil with the ECU off. I am not sure how. The part that I was trying to get through and I expect I over complicated it was that the ignition is all powered only with the ECU being powered. Are you aware that in many Mitsubishi vehicles the ignition and many sensors remain powered for 20 seconds after the engine is off.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.