Sometimes the idle speed of the car is unstable, and sometimes it will turn off when driving. What's going on here?

When the car is idling at a certain time, it is unstable, the idling meter goes up and down, and it will turn off when driving. This phenomenon is caused by excessive carbon deposition on the accelerator and spark plug of the car. As long as the owner cleans these two parts, the problem can be solved.

First, the carbon deposit on the accelerator of the automobile will lead to this fault phenomenon.

Throttle is the intake valve of automobile, which controls the intake of automobile engine, and the acceleration of automobile is also controlled by throttle. If the throttle valve fails, it will lead to the idle part, and the acceleration is still very weak. When there is carbon deposit in the sliding door of automobile throttle, it will cause air to enter the combustion chamber of the engine unsteadily, which will cause the automobile tachometer to rise and fall, and at the same time, it will also cause the automobile to stall when driving at low speed, so the owner must clean the throttle of the automobile when finding such problems. Second, the carbon deposit in the spark plug mouth will also lead to such a fault phenomenon.

Spark plug is one of the most important components in the ignition system. The working principle is that the high pressure generated by the spark plug ignites the fuel in the engine combustion chamber to make the engine work normally. When there is a large amount of carbon deposit at the spark plug port, the ignition of the automobile will not be smooth, which will lead to insufficient combustion of a cylinder of the engine or direct non-combustion, which will directly lead to unstable idle speed of the automobile, and at the same time, the automobile will suddenly turn off during driving. If this kind of fault occurs, the owner must replace the spark plug in time to solve this fault. Third, summary.

Generally speaking, if the car sometimes idles unsteadily or turns off during driving, the owner should focus on checking whether there is carbon deposit on the accelerator and spark plug of the car, and if so, clean and replace it in time. At the same time, you must develop good driving behavior in the daily driving process, and don't slam on the brakes and accelerator, because this will lead to an increase in carbon deposition inside the engine, thus reducing the power of the car and increasing the fuel consumption of the car.