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Old 05-05-2017, 11:36 AM   #1
custom10nut
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Join Date: Apr 2015
Location: East Tn (In the heart of the Smoky Mtns)
Posts: 1,893
Factory tach +Electronic Conversion Module

My factory tach is reading 200 rpm at idle. I just recently replaced my printed circuit board, and prior to that my tach worked fine.
I do have a Mallory Electronic Conversion Module, in place of points.
Again I say, the tach used to work fine.
But could the ECM be causing my issue? If it is cause, is there a filter like those used by people running HEI distributors?
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