under the dash

Hello, This may be an issue with the idle air control valve, which allows enough air to enter the engine when at idle, or it may be that the lock-up torque converter solenoid is stuck on. This would cause the symptoms you are mentioning. There are several other reasons this can occur, including low compression on one or more cylinders, but diagnostics will be completely necessary to find the issue. Sorry I can't be of more help, but here are the certified shops you can trust in your area: http://repairpal.com/dodge-within-10-miles-of-rogersville-missouri-65742