The throttle controller is designed for vehicles with electronic throttle, which allows you to select one of three possible modes of operation. In newer cars an electronic throttle pedal is installed, when the gas pedal is pressed sharply, the computer processes this information and determines whether it was done accidentally or not. While the information is being processed, time is lost, there is a certain delay, and only then the motor begins to gain speed. A throttle controller is required for the engine to start working in sport mode immediately.