Mine's doing the same thing...D Scan Gauge is rock steady...installed tach, not so much. I haven't bothered investigating at this point, yet.
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2007 42' Country Coach Intrigue #12149 CAT C-13, 2014 SRX, Roadmaster Sterling, SMI AirForceOne
FMCA, Good Sam, CCFI, CCI, NWCC
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