There is something wrong with the throttle of the free passenger. Is the car weak?

No, the accelerator of the car is broken.

1, the engine idle speed is unstable, and the high idle speed keeps decreasing, which makes it difficult to start the engine, especially the cold start.

2. The engine has insufficient power, poor acceleration performance and unstable operation.

3, the exhaust pipe of the car emits black smoke, which increases fuel consumption.