A mileage TOYOTA Camry car with a mileage. Car owners reflect the exhaust pipe black smoke, high oil consumption. After receiving the car, it was found that the car was damaged in the repair car repaired by the outside repair shop, and the harness plug of the engine was damaged. When the vehicle starts to operate at idle speed, the engine shakes irregularly, the operation is very unstable, and the solenoid valve has a continuous click and click sound. There are obvious vibration in the car, and the engine fault light is not bright. Stepping on the accelerator pedal, the engine's voice is rather dull, and the acceleration is weak. The exhaust pipe has a large amount of black smoke. The failure phenomenon is basically consistent with the customer's reflection.