When the weather started getting cold (below 40 degrees), the 9-7x has had issue starting and it idles weird. Starting, it is really slow to turn over and occasionally has a loud knock on start up. When it idles, it has this clunking sound that goes in beat with the engine. I also noticed the smell of burning rubber from the engine bay recently after a short ride. I think its a pulley, but the tensioner belt looks fine and the visible pulleys look fine.