I have an 89 accord lx manual with 220,000 miles. the car runs flawless in the spring and summer time. but last winter and now this winter, when the weather gets cold my car will stay revved up at around 3000 rpms and sometimes will not go down. after driving the car is okay but when i'm stopped the car will go back and rev up. normally it will stay around 1000 rpm's and have a smooth sound and now to say again it is loud. i've heard it may be the choker (not sure what that is) anyone with insight please get back to me asap. thanks