What does misfire mean?

[StOlivia]

In fact, misfire refers to engine cylinder misfire. Definition of misfire: Engine misfire means that during normal operation, one or several cylinders fail to combust properly. The air-fuel mixture in these cylinders cannot be ignited, and the unburned mixture is expelled into the exhaust manifold and then enters the catalytic converter. Since the temperature inside the catalytic converter is extremely high, the unburned mixture will combust there. Serious consequences of misfire: Severe misfire can cause the catalytic converter to overheat and burn out (typically, catalytic converters can withstand temperatures up to 1200 degrees Celsius, and under normal engine operation, the temperature does not exceed 920 degrees Celsius). Checking for misfire is simple: after starting the engine, let it idle and observe whether there is abnormal shaking during operation, and whether this shaking has a clear periodic pattern.