Thread: CDI problems
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timmy2 timmy2 is offline
ROW '78 911 Targa
 
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Join Date: Jul 2011
Location: Salem, OR
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Tach all over the place can be an indicator of a bad alternator Voltage Regulator.
Check your idling voltage and at 2000 rpm and 4000 rpm at the battery with a meter.

Make sure it remains almost constant around 13-14 volts and isn't spiking.
Could be what killed your CDI if it was spiking up to 16-18 volts.
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Dennis
Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C
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Old 06-21-2017, 10:37 PM
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