A car equipped with 376 engines and M1. 5.4 EFI system. The exhaust pipe of the car has uneven exhaust sound. Occasionally, the engine has no reaction (feeling plus speed) when stepping on the accelerator pedal, and the acceleration is slow, the oil in the exhaust is strong, and the exhaust gas stimulates the eyes. After receiving the vehicle, first, the fault code is extracted, and there are two fault codes, which are explained as mixture gas adaptive and oxygen sensor control respectively.