Like while you're driving? And the car sounds and drives ok? If so, there's most likely a bad connection somewhere with the dash harness. Most likely a damaged or loose connector or the tach lead could even have come loose from the harness. Could be the tach itself, but that appears to be far less likely.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed |
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