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Old 09-03-2012, 12:51 PM   #1
Join Date: Dec 2009
Posts: 44
Speedo issue

I have 2006 40 ft. Alpine Limited. Lately my speedo has been acting up. When I first start driving it reads normally. But after a few miles it reads about 20 mph faster than I am traveling. The odometer is working fine and the Silverleaf speedo works fine. Any ideas? Thanks, Doug

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Old 09-04-2012, 12:08 AM   #2
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Location: Auburn, CA, Havasu, AZ & Mulege, BCS
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IIRC, and I rarely do, the Actia speedo takes engine rpms, trans gear, and tire size, to calculate speed and mileage. Not sure how Silverleaf does it; they may be reporting engine ECM speed data directly (engine has its own algorithm for speed, very similar to Actia's). Over time there is a small difference between Actia mileage & engine ECM mileage because the calculations are done separately.

My initial theory would be that the Actia calculation has snafu'd. Could also be there is a sensor going bad and that Actia takes the sensor data verbatim while engine does a check vs other data. Call Actia, Patrick Yuen, at 574-266-2649 for his opinion.

IIWMMy wife would make me slow down 20mph to correct the situation.
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