What are the symptoms of burning out the accelerator of a car?

The possible phenomena of burning out the automobile throttle are: 1, the engine idle speed is unstable and the high idle speed drops discontinuously. 2. The engine is not idling. It is difficult to start the engine. 4. The engine has insufficient power and poor acceleration performance. 5. The exhaust pipe of the car emits black smoke, which increases fuel consumption. The following is an introduction to the relevant contents: when cleaning the throttle, it is not necessary to disassemble it, but the sealed part of the intake steam must be cleaned. When cleaning the nozzle, the idle motor must be removed. Borrowing and cleaning have their own advantages and disadvantages. Generally speaking, the maintenance station suggests that it should be dismantled to prevent other unnecessary waste.