This morning, I noticed the car started pretty rough, but evened out after a moment. As I was driving, I noticed that unless I was accelerating quickly, There was a loud rattle anytime the rpms were between 1600 and 2000 rpms. I haven't been able to have someone listen from the outside, but from the inside it sounds like it's in the center behind the dashboard. My initial thought was the motor mounts, but the sound goes away after the rpms pass 2000. It also doesn't matter if I'm accelerating or decelerating, or the speed I'm traveling. Any idea would be appreciated, as I don't have the money to go to a shop.