What Causes the Engine Fault Code for Misfire in Cylinder 3?

[GiannaFitz]

The main reasons are as follows: 1. Damage to external components: Mainly caused by components around the combustion chamber such as valves, valve seat rings, valve guides, and spark plugs. 2. Misfire due to the failure to ignite or delayed ignition of the air-fuel mixture in the cylinder: For the first scenario, it is usually recommended to 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. For the second scenario, it is usually caused by an abnormality in a certain component or part, leading to unstable engine regulation by the ECU, which fails to meet the theoretical values calibrated by the ECU, resulting in misfire.