What to Do If the Vehicle Fails the Environmental Protection Inspection?
2 Answers
Solutions for failing the vehicle environmental protection inspection include: 1. Try replacing the spark plugs, either new or used ones, as long as the electrode points are cleaned with sandpaper and the gap is adjusted properly. 2. Adjust the ignition timing by delaying it, which will significantly reduce the NO content in the exhaust. This is very important. 3. Clean the throttle body with a cleaning agent, as it might be too dirty, leading to poor emissions. 4. Poor-quality gasoline may cause incomplete combustion, resulting in excessive exhaust emissions. Consider switching to 97# gasoline or 97# ethanol gasoline.
As a seasoned driver with years of experience, the most common issue causing environmental inspection failure is excessive exhaust emissions. This needs to be addressed promptly, as fines are the least concern—it primarily affects driving safety and the environment. My own car has encountered this problem before. The solution is to first check the air filter and fuel filter to see if they're clogged or dirty. If they are, replace them with new ones immediately. Then inspect the three-way catalytic converter for any issues, as it helps reduce exhaust pollutants. If the converter is faulty, emissions will naturally be higher. I also recommend regular maintenance, such as periodic engine oil changes and cleaning combustion chamber carbon deposits, which can reduce emissions. If these measures still don't resolve the issue, take the car to an authorized repair shop for professional emission testing to identify and fix the root cause. For prevention, gentle acceleration and deceleration while driving can also help minimize exhaust emissions.
