I have an 2006 Buick. The engine RPM will vary up and down with in the first 10 minutes of starting. It goes away after that. The car has been scanned and no codes showed up. Any ideas.
Thanks
vacuum leak
How can I find it? Where might it be?
Do some searches and you’ll find instructions.
http://www.cartalk.com/content/puzzler/transcripts/199942/answer.html