How to determine that the throttle is broken? What symptom is the accelerator broken?

I believe that many car owners have the awareness of cleaning the throttle, but it is estimated that few car owners know what the symptoms are when the throttle is broken. Let's see how to judge that the throttle is broken. Symptoms of accelerator damage: 1. Engine idle speed is unstable, high idle speed does not drop, and it is difficult to start the engine, especially cold start; 2. The engine is unstable or not idling; 3. The engine is difficult to start; 4. Insufficient engine power, poor acceleration performance and unstable operation; 5. The exhaust pipe of the car emits black smoke, which increases fuel consumption. These symptoms are all possible symptoms when the throttle is broken, so how to judge that the throttle is broken? The most accurate method is to check the throttle with a scan tool and observe the data flow. If the throttle opening is large, it must be cleaned. If it is determined that the throttle fault is permanent, it must be replaced. Under normal circumstances, the throttle cannot be disassembled for maintenance, only the assembly can be replaced. It is worth mentioning that proper and standardized throttle cleaning can ensure the normal operation of the engine, but cleaning must be restrained. Excessive cleaning will lead to premature scrapping of the throttle. Frequent cleaning will cause the special coating in the throttle valve cavity to be gradually cleaned away. If the inner cavity loses its coating, it is more likely to cause greasy adhesion, which becomes a vicious circle and the final result is scrapping. Next: After wiping the accelerator, the car shook.