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Traveling at 40 mph my Sportage engine quit,no coughing,sputtering or popping just shut down and coasted to a stop. After trouble shooting using my Sportage garage manual and many forum suggestions, I removed the timing belt. The timing belt has a three inch smooth spot and a one inch smooth spot. I have a Belt and water pump on order. I was wondering if this malfunction caused the engine to shut down? Wouldn't the belt keep moving, due to the speed of the engine and cam sprocket's? If the belt continued spinning then wouldn't the engine misfire and sputter? I could use some help from an experience KIA mechanic. Thanks for any help or suggestions. I have noticed that my "shut down" is not uncommon but many different fixes and confusing troubleshooting options make this Kia problem a real pain. Even KIA experts are divided on causes and repair of an engine shutdown. For example, some people and the shop manual say a cam position sensor or crankshaft sensor defect, would cause a shutdown, but many say this would only cause a misfiring engine. The troubleshooting guide also requires checking the fuel system. How could a fuel problem not cause at least a few engine sputters or pops? Is there any one who understands this computerized Kia Sportage?