Annual inspection tail gas failed.

1. Clean the throttle once before vehicle inspection.

2. Use No.97 gasoline in advance. High-grade oil has little pollution. Moreover, it is best to have ethanol gasoline. If ethanol gasoline is mixed with 10% ethanol, the tail gas emission will be correspondingly reduced by 10%.

3. On the way to the inspection field, increase the engine speed. How to pass the automobile exhaust detection? Due to the crowded urban roads, stop-and-go, and insufficient combustion, pollutants are attached to the surface of the three-way catalyst. At high speed, the emission of pollutants from gasoline combustion is the lowest, and the high-speed airflow can also wash away the pollutants attached to the ternary system.

4, check the appearance, big feet boom throttle. It is the most unwise to check the line on a cold car. There is a simple reason. The optimum working temperature of three-way catalytic converter is 400 to 800 degrees, and it takes a long time from cold car to 400 degrees. How to pass the automobile exhaust detection? The temperature of the three-way catalytic converter can quickly reach above 400 degrees by slamming on the accelerator for a few minutes before detection, and it can keep the heat for a period of time.

If you are worried about your car, you can take down the air filter or spray a small amount of water on it.