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Why is my car’s RPM gauge bouncing?

My car’s RPM gauge has started bouncing up and down while I’m driving. I haven’t really noticed anything else different about the way my car drives, though. Why is my car’s RPM gauge bouncing?

avatar
Sarah Gray · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Your car’s RPM gauge could be bouncing due to:
  • Faulty spark plugs 
  • A bad crankshaft position sensor 
  • A bad idle air control valve
  • Dirty fuel injectors 
  • Ignition coil problems
  • Timing belt issues 
  • Low transmission fluid
A mechanic can help you diagnose the root cause of the issue and perform the necessary
car repair
to avoid further damage to your car’s components.
MORE: How to decide if you should take your car to a repair shop or mobile mechanic 
View full answer 
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