After going nuts with a bouncing tach I got it done today. I used a 10k ohm 1/4 amp resistor in the tach signal line and that took out all except a 100 rpm bounce. I was going to leave it at that but I had a few old coils on the bench so I tried one. Boom....zero bounce and all is right with the world. I may try taking out the resistor but rather leave it. My luck it will start bouncing again.
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