What to Do If Your Vehicle Fails the Annual Emission Test?
2 Answers
To pass the annual emission test, you should focus on improving the combustion and lubrication systems. Here are specific methods: 1. Add a high-quality fuel system cleaner. It effectively removes gum, carbon deposits, and sediments from the combustion chamber, intake/exhaust valves, fuel injectors, and fuel lines while driving, keeping all parts of the fuel system clean. It also breaks down water in the fuel, improves the fuel grade, and reduces harmful emissions. It is especially recommended after using low-quality fuel. 2. Use a high-quality fuel injector cleaner and specialized equipment to clean the injectors. This removes carbon buildup, eliminates engine shaking, hesitation, poor atomization, and acceleration issues, ensuring a more precise air-fuel mixture. It restores power, saves fuel, reduces emissions, and does not harm the injectors, oxygen sensor, or catalytic converter. 3. Clean the throttle system with a high-quality throttle or intake system cleaner. Specialized cleaning equipment can remove gum and deposits from the throttle body and intake manifold, as well as carbon buildup from the intake valves, combustion chamber, and catalytic converter. This restores normal compression ratio, eliminates idle instability, knocking, misfires, and ensures a more precise air-fuel mixture. It saves fuel, reduces emissions, eliminates engine weakness and poor acceleration, enhances vehicle power and driving performance, and protects all fuel system components from rust and corrosion.
As a car enthusiast, I've dealt with the issue of failing the annual emission test. That time, my car's CO levels exceeded the standard due to a clogged catalytic converter. The solution was to preheat the engine and then drive at high speed for 20 minutes to clean the combustion system. If it still didn't pass, the next step was to clean the catalytic converter and fuel system. I recommend regularly replacing the air filter to prevent clogging and using high-quality fuel to reduce carbon deposits. For prevention, adding fuel system cleaner every 5,000 kilometers helps maintain the system, and driving gently with fewer sudden accelerations is advisable. Professional repair shops can provide a thorough solution, which may cost more but ensures safety and reliability. Don't underestimate emission issues—they affect engine health and environmental regulations. Address them promptly to avoid fines.
