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Old 09-05-2019, 10:30 AM   #16
trohde78
 
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Drives: '17 Red Hot 2SS 6MT
Join Date: Mar 2018
Location: Chicago Suburbs
Posts: 346
I had this happen on my car, and it was a loose ground wire at the jump stud. It was because I didn't tighten it enough when I did some work, but it caused that exact condition with the tach.

Last edited by trohde78; 09-05-2019 at 02:47 PM.
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