What are the causes of engine misfire?

[EliMarie]

Here are the reasons for engine misfire: 1. Excessive wear of engine cylinder liner and piston rings, poor sealing of intake and exhaust valves, and air leakage from valve oil seals leading to insufficient cylinder pressure causing misfire. 2. Poor fuel atomization due to injector wear, resulting in increased or decreased fuel quantity, or even no fuel injection causing misfire. 3. For high-pressure common rail engines, there might also be misfire caused by issues with the engine ECU. Below are the hazards of engine misfire: 1. Decrease in engine speed and power, making the engine unable to operate normally. 2. Increased fuel consumption and emission of large amounts of black smoke. 3. Accelerated wear of engine components leading to increased heat, deterioration of engine oil, and shortened oil change intervals.