What Causes Misfire in Cylinder 3?
2 Answers
Misfire in cylinder 3 is caused by damage to external components. Here are specific details about cylinder 3 misfire: 1. Caused by damage to external components: Mainly involves components around the combustion chamber such as valves, valve seats, valve guides, and spark plugs. 2. Misfire caused by failure to ignite or delayed ignition of the air-fuel mixture in the cylinder. For the first scenario, typically check the spark plugs, clean carbon deposits from the intake and exhaust valves, and inspect the turbocharger for issues such as wear or erosion of the turbine wheel. The second scenario usually occurs when an abnormal condition in a certain component or part causes unstable engine regulation by the ECU, failing to meet the theoretical values calibrated by the ECU, resulting in misfire.
Last time my car had a misfire in three cylinders, and I was really anxious. I took it to the repair shop and found out it was a faulty ignition coil—that small component directly affects the spark plug's ignition. The mechanic said it could also be due to excessive carbon buildup on the spark plugs, incorrect electrode gap, or aging high-voltage wires, which can cause similar issues. The most severe scenario is insufficient cylinder pressure—if the piston rings are worn or the valve seals are loose, it could be troublesome. That time, I also learned a trick: regularly check the coolant and engine oil levels, as neglecting these details can also lead to abnormal engine operation. If your car starts shaking or loses power during acceleration, don’t force it—get it professionally checked right away.
