How to find a vacuum leak?

FERNAN_CAISIP2002

MEMBER
2009 CHEVROLET AVEO
42,000 MILES

Hi good morning.
I am Fernan and I own a Chevy Aveo Hatchback 2009 model. My problem starts when I notice that the idling of my car seems to be abnormal. When I am using my car and the gear change to neutral position the idling rises up to 2000-2500 rpm and when I engage the gear to 1st gear to last gear the idling set back on its normal level. My gas consumption rose up as well because of this idling problem. I also notice that there are times idling was in normal level (700-900 rpm) even in neutral position.
Please help me solve this problem. Thank you very much.

3 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

It sounds like you are having a problem with the idle air control valve. Here is a tutorial showing what is involved with its replacement:

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

I've attached picture replacement steps below of the idle air control for your vehicle. The attached picture include location and relearn procedure. Hope this helps and thanks for using 2CarPros.

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Wednesday, December 23rd, 2020 AT 1:00 PM

THRIFTSHOPBUDDY

MEMBER
1 POST

Hi Danny, do you have a tutorial on the 2009? Its parts are different than pictured.

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Saturday, October 23rd, 2021 AT 4:24 PM

KASEKENNY

MECHANIC
18,907 POSTS

Danny is no longer on the site. Can you let us know what specific info you are looking for? This post was on a 2009 Aveo and you are asking for a 2009 but I suspect a different vehicle.

If that is the case, can you let us know what vehicle you have, and I am sure we can get you the info you are looking for?

Thanks

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Sunday, October 24th, 2021 AT 6:26 PM