What are the solutions for vehicle exhaust emissions not meeting standards?

[StSadie]

Car exhaust emissions not meeting standards can be addressed by replacing the spark plugs. Here are some related solutions for car exhaust emissions not meeting standards: Replacing spark plugs: Both new and old ones can be used, as long as the electrode points are cleaned with sandpaper and the gap is properly adjusted. Cleaning the distributor contacts and rotor contacts: Adjust the ignition timing. Delaying the ignition time will significantly reduce the NO (nitric oxide) content in the exhaust, which is crucial—please remember this! Since the ignition time is delayed, the combustion time in the combustion chamber will be shortened, and the maximum combustion temperature will decrease, resulting in reduced emissions of hydrocarbons and nitrogen oxides. However, this will lead to a decrease in engine power.