Why does my RPM go up and down while driving?

My car is acting weird lately. I’ll be driving normally and the RPM will be all over the place—even though I’m not changing anything! Why does my RPM go up and down while driving?

Find out if you’re getting ripped off on your car insurance in less than two minutes.
No spam · No long forms · No fees
Find savings (100% Free)
rating white
3.5k Ratings
Answer provided by
Brittni Brinn
Answered on Feb 11, 2022
That sounds worrying for sure! Here are some possible reasons your RPM is going up and down while driving:
  • Worn-out spark plugs
  • Vacuum leaks
  • Bad idle air control valve
  • Malfunctioning throttle pedal position sensor
  • Dirty fuel injectors
  • Issues with the transmission
If it’s something like worn-out spark plugs, it will be a quick fix. However, a fluctuating RPM could indicate that there’s a more serious problem with your fuel or transmission systems. It’s best to take your car to a mechanic as soon as you can so the problem doesn’t get worse.
While you’re waiting for repairs to be completed, why not see if you can get better rates on your car insurance? Car insurance super app Jerry can help you find the best coverage and rates available, saving you money and giving you peace of mind.
Hopefully, you can get your car looked at soon!

Here to save on car and home insurance? Great, you do that. We’ll do everything else.

Sign up in under a minute.
No need to fill out forms or shop around. Sign up in 45 seconds to start saving. Jerry does the rest.
Jerry collects and analyzes your current coverage.
Say hello to Jerry, your new insurance agent. We’ll contact your insurance company, review your current plan, then find the coverage that fits your needs and saves you money.
Get the best options before your renewal.
Jerry does all the picky, busy work by comparing prices and coverage from more than 50+ insurance companies. We compare what we find to your current policy and offer you the three best options before every renewal.

Easiest way to compare and buy car insurance

No long forms
No spam or unwanted phone calls
Quotes from top insurance companies
Find insurance savings — it's 100% free