When shifting the transmission into reverse the RPMs shoot up?

2001 KIA RIO
114,268 MILES
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1CRAZYGUIDO
  • MEMBER
  • 25 POSTS
This is a problem that has started happening within the last month or so and it only happens intermittently but what happens is I’ll start the car and when I shift it into reverse the RPMs shoot way up and I have almost hammer the brake pedal to the floor but as soon as I shift it into neutral or drive it goes right back to normal and I cannot figure it out for the life of me. So, any thoughts or suggestions you can share would be greatly appreciated.
Apr 14, 2025 at 2:00 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
We should run the odes first, but it sounds like you may have a vacuum leak.

Here is a guide to help:

https://www.2carpros.com/articles/engine-idles-too-high

Please go over this guide and get back to us.


Apr 15, 2025 at 9:48 AM
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