i think the single wire that you refer to goes to the pickup in the distributor.those engines did not have the pickup at the flywheel.that green wire has been known to fall apart at the distributor end and cause intermittent spark.check it out.

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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
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