What are the causes of misfire in the third cylinder of a car?
2 Answers
The causes of misfire in the third cylinder of a car are: 1. Damage to external components, mainly caused by parts around the combustion chamber such as valves, valve seats, valve guides, and spark plugs; 2. Misfire caused by the inability to ignite or delayed ignition of the air-fuel mixture in the cylinder, usually due to abnormalities in a certain component or part, resulting in unstable ECU regulation of the engine, failing to meet the theoretical values calibrated by the ECU. A cylinder is a pneumatic actuator in pneumatic transmission that converts the pressure energy of compressed gas into mechanical energy. There are two types: those that perform reciprocating linear motion and those that perform reciprocating swinging motion. Cylinders that perform reciprocating linear motion can be further divided into four types: single-acting, double-acting, diaphragm, and impact cylinders.
When I encountered a misfire in the third cylinder, I found that the most common issue was with the ignition system, especially aging spark plugs or severe carbon buildup. Those slender spark plugs are particularly prone to wear under high temperatures, and if the gap becomes too large, they won't ignite. If the ignition coil's insulation is damaged and leaks electricity, it can also cause that cylinder to stop working. Another common issue is clogged fuel injectors, especially if you frequently take short trips, as impurities in the gasoline can block the injector nozzles. Insufficient cylinder compression is also critical—for example, if the valves don't seal properly or the piston rings are worn, a compression test will reveal the problem. Wiring issues can't be ignored either; if the wires controlling ignition and fuel injection get frayed, the signals can fail. Last time I inspected a car, the misfire was caused by a wiring harness that had been chewed through by rodents.
