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High Idle

Tiny
ADEELSIDDIQ
  • MEMBER
  • 2003 HONDA ACCORD
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
I bought this car used. Had 100,000. Now it has 160000KM. When I start in morning, it idles at 1500RPM and then gradually comes to normal i.E 600 RPM. But when I am struck in traffic stop n go situation, the idle starts to rise gradually ( As high 1500-2000 RPM) while the temperature remains constant. After driving when I put the cark in park, the idles jumps to 1500 RPM. If I have to restart the car soon after shutting it warm, it idles high.

Just did a recent tune up and cleaned throttle body.

Please advise, what can be done.
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Thursday, June 10th, 2010 AT 10:51 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like a faulty idle air control motor. This will cause the car to have erratic engine speed. Have had the car scanned for codes?

https://youtu.be/dPOrNy-Y9Ng

You might find this article helpful:

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please let me know if you have any questions.

Thank you.
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Thursday, July 15th, 2021 AT 9:17 PM

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