rather recently i noticed that when I just turn my car on the RPMs are bouncing between 1k and 300. The car isnt choking out, but it acts like it wants to. I figured it would be because of the cold weather, so I just upped the idle speed a little. It seemed to solve the problem for a few days, but its back at it again. Im just wondering if this is something that should bother me or not. and what to do about it if it is.