Abstract: A control system for controlling the fuel/air supply to the engine of an automotive vehicle comprises a sensor which is located adjacent a foot throttle pedal and operative to sense the position to which the pedal is moved, and also to generate signals corresponding to the sensed foot pedal position, and also comprises a vehicle speed sensor which is arranged to generate a signal corresponding to the speed of the vehicle. A control unit is arranged to receive as input signals at least the signal generated by the foot pedal sensor and the signal generated by the speed sensor. The control unit operates with two functions, namely a speed function which is contingent on the position of the foot pedal, and a base function for the fuel/air supply to the vehicle motor, this base function being contingent on at least the position of the foot pedal.