Thread: erratic tach
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930cabman 930cabman is offline
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Join Date: Jan 2008
Location: sunny buffalo
Posts: 586
funky tach

I have had a similar issue with the tach on my 1987 930. Every so often, maybe once a month, the tach will read 5,000 and fluctuate when the engine is at idle. it has behaved in this fashion since I owned the car, about 18 months. I will shut down the engine and restart, generally will correct. The charging system appears ok, never an issue with low battery, possible a weak ground or other internal electrical gremlin.
John G
Old 03-03-2009, 07:59 AM
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