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High RPM fluctuation

Tiny
BOHAIR
  • MEMBER
  • 2003 CHEVROLET CAVALIER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 92,500 MILES
I have a 2003 Chevy Cavalier. While in park and pressing the accelerator gradually, the rpms fluctuate after reaching 4500 rpms. Once the fluctuating starts, it drops to 4000 then back to 4500 rpm over and over again and will not exceed 4500 rpm no matter how much the accelerator is depressed. Rpm does not fluctuate at any point less than 4000 rpm. A mechanic told me to change out the idle control but unfortunately the problem still exists. What suggestions does anyone have? Thanks
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Saturday, August 13th, 2011 AT 12:45 AM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Go to this link for more information: https://www.2carpros.com/articles/engine-surges
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Saturday, August 13th, 2011 AT 12:53 AM
Tiny
DANLESABRE
  • MEMBER
  • 230 POSTS
That is normal. The car's computer is programmed to prevent the engine from over-revving.
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Saturday, August 13th, 2011 AT 5:23 AM
Tiny
BOHAIR
  • MEMBER
  • 10 POSTS
Thank you for the help
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Saturday, August 13th, 2011 AT 3:32 PM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Happy we could help.
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Wednesday, September 21st, 2011 AT 5:09 AM

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