What Causes Engine Misfire in the Cylinder?
3 Answers
Engine misfire in the cylinder can be caused by: 1. Spark plug clogging or damage; 2. Issues with cylinder wires; 3. Problems with the ignition coil; 4. Fuel injector clogging or low voltage causing DME internal fuel injector data loss; 5. Issues with the air-fuel mixture; 6. Problems with cylinder pressure. The hazards of engine cylinder misfire include: 1. Damage to the catalytic converter; 2. More than a 1.5-fold increase in harmful emissions; 3. Failure to meet vehicle emission standards. The car engine is the device that provides power to the vehicle, serving as the heart of the car, determining its power, fuel efficiency, stability, and environmental performance.
I've encountered engine misfires quite a few times. The most common causes are spark plug carbon buildup or failure to ignite the spark. Another issue is aging ignition coils that can't produce sparks, causing the engine to shake. Fuel system problems like clogged injectors or insufficient fuel pump pressure can also lead to uneven fuel distribution. Unstable air supply, such as dirty sensors or air leaks, can mess up the air-fuel ratio and cause misfires. Mechanical issues like excessive valve clearance or worn piston rings might also be culprits. When misfiring occurs, the car jerks, fuel consumption spikes, and it can even damage the catalytic converter if severe. I recommend regular spark plug replacement and throttle body cleaning—don't wait until problems arise to spend big on repairs.
My old car used to misfire frequently, running like it was out of breath. The mechanic said the spark plugs had reached the end of their lifespan, and replacing them stabilized the engine. Sometimes it's the ignition coil or wiring that's faulty—if the current can't pass through, the spark won't ignite. Poor fuel quality can also clog the injectors, and if the fuel line is blocked, misfiring occurs. On the air side, small leaks or faulty sensors can also be culprits. I've noticed misfires happen more often in hot weather, likely because high temperatures accelerate part wear. Misfires sap the car's power and increase fuel consumption, so I always remind the mechanic to check the ignition system during maintenance—a small investment can prevent big troubles.
