What are the causes of engine failure?

[RachelLee]

The causes of engine failure include: 1. Poor quality gasoline, which not only causes incomplete combustion of the air-fuel mixture in the cylinder but also leads to excessive carbon deposits, potentially clogging the fuel system and corroding components. It also affects the normal concentration of the air-fuel mixture, ultimately resulting in engine failure accompanied by shaking and vibration; 2. Damaged or loose oxygen sensor or sensor connector, which can cause the air-fuel mixture to be too lean or too rich, leading to engine failure; 3. If the air flow sensor or its circuit malfunctions, the engine control unit (ECU) will not receive accurate intake air volume signals, making it impossible to properly regulate the fuel amount. This can result in an overly lean or rich air-fuel mixture, causing the engine to malfunction. Sometimes, this is accompanied by the illumination of the engine warning light; 4. Carbon deposits on spark plugs can cause poor engine performance, leading to issues such as difficulty starting, unstable idling, poor acceleration, backfiring during sudden acceleration, excessive exhaust emissions, and increased fuel consumption.