Speedometer spikes when revved?? - Cobalt SS Network

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Speedometer spikes when revved??

2.2L L61 Performance Tech 16 valve 145 hp EcoTec with 155 lb-ft of torque

Speedometer spikes when revved??

Old 12-24-2018, 11:10 AM
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Speedometer spikes when revved??

So recently I've noticed that when I rev my car sitting still the speedo spikes randomly.. I've tried it in first and reverse clutch down obviously and it does it and it also will in neutral with the clutch up... dontnreaply rev the car rolling so any other gear I haven't tried wouldn't think that mattered honestly.. was just curious to see if anyone else has had something like this happen
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