Thanks for the quick reply. At least there is hope, but it sounds expensive to replace the valve springs and exhuast valve. From all my searching, I had seen that it could be carbon buildup in that cylinder causing the exhaust valve to stick hence the shaking, and that a vacuum leak in the EGR could cause the car to run rough. Good to know that the EGR can be done easily, but I guess I will have to take it in and get cylinder 5 looked at before it gets any worse.
2006 Charger SXT 3.5L HO Midnight Blue