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Tach problem...Need Help!!! Tach problem...Need Help!!!
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  #1 (permalink)  
Old 03-05-2011, 02:29 PM
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Default Tach problem...Need Help!!!
It just started yesterday while I was driving, the needle just swings wildly from 0 to 7000. No pattern that I can see. At idle it sometimes goes to 0 and sometimes moves.

Tach is a Revolution gauge.

Anyone got any ideas? Thanks
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Old 03-05-2011, 03:17 PM
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What kind of ignition do you have?
Does you in dash tach act the same way?
Check all your wire contacts.
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Old 03-05-2011, 03:30 PM
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Check to make sure you have a good solid ground on it.
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Old 03-08-2011, 09:20 PM
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Yep check the ground.
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Old 03-08-2011, 09:30 PM
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Does the tach pick up from an electronic ignition box (MSD)? If so check the tap. They usually clip it on with some kind of clamp-on connector that makes a "pin prick" connection through the insulation. It can separate from vibration.
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