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Tach not switching from volts to rpm

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Old 03-28-22, 03:36 PM
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Tach not switching from volts to rpm

My 1978 rx7 has a problem with the tachometer. It won’t switch from volts to rpms when running. It also has a new volt regulated and new alternated. What could be causing this problem?
Old 03-29-22, 10:01 AM
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when mine did that it was the ignition, the points
Old 03-29-22, 02:23 PM
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I will check it out
thanks
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