06 envoy idle problem

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06 envoy idle problem

Unread post by Beginnermechanic » Tue Mar 22, 2016 1:55 pm

When first turn on or anytime the car is cold the idle goes crazy up & down up & down. When i put it in gear it goes away.


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Re: 06 envoy idle problem

Unread post by carriedi » Wed Mar 23, 2016 10:17 am

a common problem with a hunting idle cold is a vacuum leak. Is your "check engine" light on?

you should leave your vehicle at a shop over night and have them scan it first thing in the morning so the can view the scanner data when the idle is jumping around.
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