Had just bought used Monaco Windsor, DP and had left Mountain View AR, and had drive approximately 60 miles (in mountains) and got to St. Joe AR on two lane road (Hwy 65) and lost all power. Engine would idle, transmission would shift but throttle pedal had no effect on engine. Called Cummings, and they told me to check the KING CONTROL, which operates remotely from the throttle pedal. I checked it by manually moving the fuel input level and the engine functioned normnally. I called King Controls, who sent me a new one overnight at the cost of @500+. I installed it and it worked fine until I got back to Florida and then malfunctioned again. I again contacted King Control and they sent me another one. I installed that one and it has worked good for two plus years.