C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Crazy Tach

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Old Oct 16, 2001 | 01:50 AM
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From: Newport News Va
Default Crazy Tach

My tachometer seems to have a mind of its own. At idle (I think it's at idle, anyway) the tach jumps from around 12-1400 rpm. But not all the time, it seems it's only this way for a few seconds at a time. It's only done it once while actually moving, but that was tonight, so it could be getting worse. (The jumpiness is much too fast for, and doesn't correspond to engine rpm changes)
Any ideas? :confused:
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