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RPM's go higher than normal then balance out

Tiny
MELISSA DODSON
  • MEMBER
  • 2012 HONDA CIVIC
  • 4WD
  • AUTOMATIC
  • 82,000 MILES
I added Gum Out octane booster few weeks later I noticed my rpm's started acting weird. When I go to stop they go down normal towards the one then jump up then back, same as when I'm driving faster the rpm's will go higher than normal then balance out. I'm a single mom and don't know a trusted mechanic in my area and don't want to pay for more than needed.
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Thursday, February 28th, 2019 AT 9:58 PM

5 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This sounds like you might have a vacuum leak. Is there any way you could take a video of what's going on and upload to us? This would help us confirm a definitive answer to what's going on.

Thanks,
Alex
2CarPros
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Friday, March 1st, 2019 AT 1:59 AM
Tiny
MELISSA DODSON
  • MEMBER
  • 3 POSTS
Thank you so much. I will try to send a video.
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Friday, March 1st, 2019 AT 8:43 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hello,

If I can jump in here is sounds like you need to service the throttle bore. Leave the bore wiring connected while you do the service. Here is a guide to help:

https://www.2carpros.com/articles/throttle-actuator-service

This guide can help as well:

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

Please run down these guides and report back.
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+1
Monday, March 4th, 2019 AT 11:03 AM
Tiny
MELISSA DODSON
  • MEMBER
  • 3 POSTS
Thank you.
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Monday, March 4th, 2019 AT 3:52 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Please let us know what happens :)
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Tuesday, March 5th, 2019 AT 9:51 AM

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