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Old 05-17-2017, 12:16 PM
Ron La Savio Ron La Savio is offline
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Join Date: May 2015
Location: Southern Colorado
Posts: 7
Default erratic Tach readings.

What would cause the tachometer to give erratic readings when additional power is turned on like turn signals, air condition, etc, while driving. This happens after the car is warmed up and running.
Got a BBC in a 70 Chevelle SS.
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