SilverSSedan, you should carefully read and reread Stamina's post and stop posting stuff like this.
Yess cold air has the potential to provide more boost, but our cars are airflow monitored, which means the colder air you get, the less boost it takes to reach the airflow target at any given RPM.

 

This guy knows what hes talking about. I tried to tell another member this also most likely in the intake after map before turbo=lean at idle, after turbo leak will run rich. Then someone piped in but its under vacuum so it would be running lean at idle. No wrong if leak is after turbo= rich. Yes the guy was correct on a na engine not turbo. Only from the intake to the turbo is under vacuum from the turbo on is positive even at idle he figured it out by tightening everything. A map problem is also possible but more likely leak in intake after map just as he said. This is learned from experiencing both conditions on different vehicles turbos and I'm sure some of you already know this but I have been seeing a lot of these posts lately rich or lean condition at idle. Hope this saves some time and helps someone out.