An engine model has been developed and controlled by the system to prevent stalling conditions when the automobile is at rest. The main input for the engine is throttle position in degree angle and the main control output is the engine speed in rpm. The engine speed is controlled by the amount of air supplied to the engine. Idle speed control is an automotive issue in which fuel gets consumed more during idling state of an automobile while driving and so its predictive rate will increase in the future based on the increase in traffic requirements. The PID control technique is used to tune the parameters of non-linear plant model into linearized conditions for stable equilibrium. Through this intelligent technique, we are able to define control parameters for the Idle Speed Control system of the engine model.