The tach goes to zero because the engine "cut out". When ir registers again, it is because the car is running. Are you describing a problem where the engine stops and then re-starts while driving?
What's wrong with a 2008 grand prize when the rpm gauge brop down and car cut of while driving but it starts back up.
This doesn't happen all the time, just a fter the car has been running for 30 minutes or so.
2003 Pontiac Grand Prix
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Maintenance & Repair
my brake lights went out but car was starting and running okay. Then my rear window wouldn't roll up. when my husband tried to fix that the car quit turning on the and the key got stuck. The car woul...
2001 Pontiac Grand Prix GT
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Maintenance & Repair
ive got an issue with my car. i have a 2000 Pontiac Grand Prix GTP. on Thursday I preformed an engine degrease and sense then my fans won't run, my car uses more gas then it should (and by that i mean...
2000 Pontiac Grand Prix GTP
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Maintenance & Repair
What would cause rpms to be affected while slowing down from 55mph to 15mph & then back to 55mph? If I switch it into N & then back to D it doesn't do anything.
2002 Pontiac Grand Prix GT Coupe
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Maintenance & Repair
Why I cut off in the middle of driving
2002 Pontiac Grand Prix SE
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Maintenance & Repair
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