How to Solve Excessive NO in Exhaust?
2 Answers
The solution to excessive NO in exhaust is: First, clean the cooling system and heat dissipation system, and then flush the lubrication system. NO is the general term for nitrogen oxides, which are gases formed by the chemical reaction of nitrogen and oxygen. The main emissions from compression-ignition engines are NO, while spark-ignition engines mainly emit CO, HC, and NO. For gasoline engines, excessive NO is relatively rare. The reasons for excessive exhaust emissions include: 1. Aging of car components: This mainly applies to older vehicles, as prolonged use leads to aging of parts. Owners can usually feel a noticeable decline in performance, and the exhaust emissions are also worse than before. 2. Poor fuel quality.
Last time I checked my own exhaust emissions and found they exceeded the standards, the usual causes included an aging or clogged catalytic converter, which is the key component for processing exhaust. You should first use an onboard diagnostic tool to read the fault codes. If the oxygen sensor shows an issue—it controls the air-fuel ratio inaccurately—just replace it. A dirty air filter can also cause insufficient oxygen intake, leading to high NOx emissions, and replacing it will help a lot. Don’t slack on regular maintenance; clean the throttle body and fuel injectors every six months to reduce carbon buildup. If the annual inspection still shows excessive emissions, don’t hesitate to go to a repair shop to replace the catalytic converter. The cost ranges from a few hundred to a few thousand. For convenience, go to a 4S shop—they perform professional tests to fix the issue thoroughly, ensuring your car is safe and eco-friendly on the road. Either way, don’t delay too long and risk getting fined.
