How to Deal with Black Smoke When Deeply Pressing the Throttle in Place?

[GavinRose]

Here are the reasons and solutions for black smoke when deeply pressing the throttle in place: 1. Overly rich air-fuel mixture: It is necessary to check whether the oxygen sensor has failed. If the oxygen sensor fails, the vehicle loses the ability to automatically adjust the fuel injection volume, making it easy for black smoke to appear when deeply pressing the throttle. Corresponding parts such as the air filter, fuel injector, valve seal, cylinder liner and piston assembly, and oxygen sensor need to be repaired or replaced. 2. Excessive fuel impurities: If low-quality fuel is added, gasoline will produce many impurities after combustion. Always refuel at reputable gas stations. 3. Decreased or failed spark plug performance: The spark plug is the component that ignites the combustible mixture. If the spark plug ages, it cannot effectively ignite the gasoline, resulting in incomplete combustion. In this case, the only solution is to replace the spark plug.