What are the causes and solutions for excessive exhaust emissions?
2 Answers
The main reasons for failing annual vehicle exhaust emission tests are poisoning and failure of the three-way catalytic converter. The specific causes and solutions are as follows: Three-way catalytic converter poisoning: Three-way catalytic converter poisoning occurs due to high sulfur content in gasoline, the use of sulfur-phosphorus antioxidants in lubricants, and traffic congestion. When this happens, purchase a bottle of cleaning agent from the auto parts market to perform a three-way cleaning maintenance on the engine. After maintenance, the vehicle's exhaust emissions will meet the annual inspection standards. Three-way catalytic converter failure: Three-way catalytic converter failure can be categorized as reversible or irreversible. Reversible failure is caused by prolonged use of the catalytic converter and high-temperature deactivation of the catalyst. Irreversible failure results from sintering or damage to the catalytic converter. In such cases, purchase a bottle of three-way maintenance agent from the auto parts market to perform maintenance on the engine. During the process, if a strong sulfur dioxide odor is emitted, it indicates reversible failure; otherwise, it is irreversible. Subsequently, the vehicle should be taken to a repair shop for maintenance or replacement.
I've been driving for nearly twenty years and have encountered many issues with excessive exhaust emissions. The main cause is incomplete combustion in the engine, such as when the air filter is clogged, leading to insufficient air intake and incomplete fuel combustion, resulting in higher emissions. Other factors include aging oxygen sensors or failed catalytic converters, which lose their purification function. The solution is quite simple: regular maintenance is key. Replace the air filter every six months and check the spark plugs and sensors. If emissions exceed the standard, don't ignore it—take the car to a repair shop immediately for diagnostic testing to identify specific fault codes. You might need to clean the fuel injectors or replace the catalytic converter. Remember to use qualified gasoline to avoid impurities and develop good habits to reduce idling time. This is an environmental issue—excessive exhaust emissions pollute the air and affect health. Maintaining your car on time not only saves money but also helps protect the urban environment.
