What is multi-cylinder misfire?

[VanReese]

There are many causes of engine misfire, which can be mainly divided into the following two aspects: 1. Damage to external components: mainly caused by components around the combustion chamber such as valves, valve seat rings, valve guides, and spark plugs. Usually, check the spark plugs, clean the carbon deposits on the intake and exhaust valves, and inspect the turbocharger for any issues, such as wear or burning of the turbocharger impeller. 2. Misfire caused by the failure to ignite or delayed ignition of the mixture in the cylinder: This is usually due to an abnormality in a certain component or part, causing the ECU to regulate the engine unstably, failing to meet the theoretical value calibrated by the ECU, resulting in misfire.