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Tach Problem!

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Old Jun 6, 2005 | 02:52 PM
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yankees1
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From: Girard Ill
Default Tach Problem!

On my 72 vette the tach which was working normal, began giving erratic readings as the needle was fluctuating over a 1000 rpm range. Then yesterday the tach stopped working altogether. Is the tach mechanical driven or electronic?
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Old Jun 6, 2005 | 02:59 PM
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From: Valparaiso IN
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Originally Posted by yankees1
On my 72 vette the tach which was working normal, began giving erratic readings as the needle was fluctuating over a 1000 rpm range. Then yesterday the tach stopped working altogether. Is the tach mechanical driven or electronic?
Unless it's been upgraded it's a cable. You can disconnect the cable from the distributor and give it a spin or attach your drill to it. If it spins, the cable is good and the gear in the dist is probably stripped. If the spinning of the cable does not move the needle, then the cable is most likely bad, but could be stripped at the tach itself.
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