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Old 07-24-2023, 10:35 PM   #6
leftybass209
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Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,194
Re: Tachometer calibration

I can add that, I have a tach that was reading low, also HEI. I assumed the board was bad and replaced it, using a new board from Cajun Tach shop. It still reads exactly the same, and has a hangup where it will freeze.

I assume the issue is with the physical mechanism needing recalibration, not the electronics.
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