How to solve the problem of excessive automobile exhaust

1, replace the engine;

2. Replace the spark plug;

3. Replace the three-way catalytic converter;

4. Check the oxygen sensor;

5. Clean the air intake system, exhaust system and fuel system;

6. Add additives to the engine oil. Automobile exhaust is the environmental pollution caused by automobile exhaust, and its pollutants include: carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, lead-containing compounds and solid particles.