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2012 F115 Tach "wondering" or bouncing

Thread starter WaterDR
Start date Aug 6, 2013

WaterDR

Senior Chief Petty Officer

Thread starter

Aug 6, 2013

Anyone know why a Tach needle would bounce around on its own or wonder and "hunt"? Any quick fix or something I can check?

I have no reason to believe that the actual rpms are changing, just that the needle is moving.

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