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What causes the RPM to fluctuate when driving?

Why do the RPM readings in my car fluctuate while I’m driving? It’s just started happening recently and I’m not sure if it’s something that I need to be worried about.

avatar
Liz Jenson · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
While you probably don’t need to be overly worried about your RPM readings fluctuating when you’re driving, it might be a good idea to
talk to a mechanic
 about the problem. This is because there are a few different potential causes for this issue, including:
  • Worn-out spark plugs (these are the most likely cause for the issue)
  • A defective idle air control (IAC) valve
  • A faulty sensor
  • Dirt or grime on your fuel injector
  • Transmission issues
Some of these problems are more serious than others, so it’s best to get the issue addressed as soon as possible.
While you’re learning about your RPM readings, why not learn about your insurance options, too? The
Jerry
 app makes it easy to find the best rates on the coverage you need. Just download the app and answer some quick questions to see a competitive list of quotes customized for you.
MORE:
How to react when your car makes noise when accelerating
Driving TipsCar Maintenance
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