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Discussion Starter · #1 ·
:confused: The rpm guage on my 94' Altima is doing some strange things lately. Sometimes it works, most times it just sits at 0. when it does work, it jumps erratically from 0 to pegged and back again. I'm not sure where to check. Could it be a loose wire somewhere or is the guage bad? Any help would be greatly appreciated. Thanks

Al
 

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Check to make sure the connections are clean and tight at the tach. Also make sure the signal is reaching the tach. It gets its signal right off the ignition coil.
 
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