How can we successfully pass the automobile exhaust emission test?

First of all, as long as the engine of the car works normally and there is no problem, it can pass the annual inspection smoothly. The premise is that you are sure that the engine of your car is really in a healthy state. No special operation is required.

If you are really worried, you can go to a professional maintenance company and do an internal cleaning of the engine. Including the cleaning of throttle valve, intake manifold, valve group and cylinder. Clean the engine, it will work better.

In addition, it is also a good choice to use fuel additives and ternary catalytic cleaning agents when refueling temporarily before annual inspection. It can ensure the cleanliness of your car oil circuit and exhaust gas treatment system. After adding additives, you can take the Ring Expressway (generally free) Lala Expressway. Accelerate the cleaning effect of additives.