I was idling my car last night when I smelt something burning. And white looking smoke coming out of my exhaust. When I pressed on the gas more came out. When i left the parkinglot I was in and stopped down the road there was no more smoke and no burning smell. Now I only have had the car idling at night when it's cold, for that amount of time (10+ mins) I don't know if the cold has anything to do with it. My car only has a turboxs bov, Cobb Sri, and a 3" exhuast from the dp back. Iv only noticed it twice in this past week. The car seems to run normal. What could be causing this?