What is the reason for the unstable idle speed of Alto?

The most common fault point of unstable idle speed is dirty throttle. Throttle is the throat of the engine, which controls the engine speed. Therefore, it is necessary to clean the throttle regularly. Now all new models use electronic throttle. After cleaning, you need to learn to take the idle speed again, otherwise the idle speed will be very high. There are still some parts that are not good, such as the ignition module and spark plug of the ignition system. Nozzle and gasoline pump in fuel system. There is also the poor quality of gasoline. The rubber parts inside the engine bracket are aging.