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before you burn up your tach...
The CDI unit and factory tach use a sine wave, and new ignition modules use a square wave signal. they are not compatible.
When I installed a new optical pickup/electronic ignition, I had to have my tach's guts replaced with a new tach's guts. still looks like factory.
I do believe you can use a tach adapter to solve this problem, also.
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Matt
72 911T Targa - Sold
Hang up the cell phone. Put down the Latte. Ignore the kids in the back seat.
Use your blinker when you want to change lanes. AND DRIVE YOUR Fu@#!NG CAR!!
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