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1977 911S Erratic Tachometer


Vehicle Information: Model: 911S; Year: 1977; Body Type: Coupe; Total Mileage: 32000;

The tachometer on my 1977 911S stays fixed at zero, and sometimes staysfixed at other positions while the car is running. This occurstemporarily, and not every time I drive the car. What could be the causeof this?

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