Engine Dashboard Tacho off

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jrichker

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Mar 10, 2000
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Probably...

There is an adjustment on the tach module that allows you to adjust for correct reading for a singe narrow range about 400 RPM wide.. Anything outside that range will be high or low. The upper RPM range is finicky - if it is spot on, it is off at idle and cruse range from 200-400 RPM. The factory probably set the cruse RPM to be the most accurate on the tach