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High Idle

Tiny
DONALD SHENO
  • MEMBER
  • 2005 AUDI A4
  • 1.8L
  • 4 CYL
  • TURBO
  • 4WD
  • MANUAL
  • 117,000 MILES
Car has high idle around 1,500-2,000 rpm's when the car is hot. I checked for a vacuum leak and found nothing. I also cleaned the mass airflow sensor. After starting my car up again I found that the idle is jerky and still idles high. The car still drives fine so I assume the problem is with some kind of sensor. Should I replace my front o2 sensor?
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Monday, February 18th, 2019 AT 4:10 PM

3 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This sounds like a problem with your Idle Air Control (IAC) valve. I have included a link for down below to a guide and vehicle specific instructions for the IAC, but it requires some specific tools to go through it. Let us know what you find out.

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

Thanks,
Alex
2CarPros
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Monday, February 18th, 2019 AT 8:29 PM
Tiny
DONALD SHENO
  • MEMBER
  • 2 POSTS
Replaced the ICV and it fixed the issue. Thank you
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Tuesday, February 19th, 2019 AT 5:07 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,968 POSTS
Good to hear, please use 2CarPros anytime we are here to help.
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Saturday, February 23rd, 2019 AT 12:49 PM

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