is this the tach made by parts place? i have that one and solved the problem but I can't remember exactly how. I think the issue is that the Parts Place tach zeroes itself at startup by going all the way to the right and then back to zero, while the MSD distributor is trying to report the rev limiter setting to the tach? I went to an external MSD box and took the ready to run module out of the loop, i cant remember for sure but i think that may have been the fix?
i thought i might have corresponded with parts place about the issue, too, but not sure. been awhile.
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