What Causes Misfire in One Cylinder?

[Carlos]

The reasons for misfire in one cylinder include: 1. Aging or leaking electrical wiring, causing intermittent ignition failure; 2. Faulty ignition coil or spark plug, resulting in poor ignition or conduction; 3. Loose or damaged wiring causing grounding; 4. Human error during maintenance, such as carelessness or mistakes leading to loose connectors and subsequent faults. Under normal circumstances, an engine's working cycle consists of four strokes: intake, compression, power, and exhaust. The engine's power performance typically shows deceleration followed by acceleration. When a misfire occurs, the pushing force during the power stroke decreases, leading to significant fluctuations in engine speed. To prevent misfires, the engine control unit (ECU) uses the camshaft position sensor to identify the misfiring cylinder.

[JakeLynn]

My car once experienced a misfire in one cylinder, and I always felt the engine shaking while driving. Later, I found out it was due to aging ignition coils, and replacing them made a big difference. Common causes could also include spark plugs being fouled with too much carbon buildup, or fuel injectors being clogged and unable to deliver fuel, causing that cylinder to fail to ignite. Other issues like insufficient engine compression, poor valve sealing leading to air leaks, or small cracks in vacuum tubes sucking in air can all cause abnormal air-fuel mixture. Problems with the ECU misjudging ignition timing can also lead to misfires. I recommend using a diagnostic tool to check for trouble codes early to avoid delaying trips and damaging the engine. Regularly cleaning or replacing spark plugs during maintenance can prevent most of these issues.

[McCollin]

Last time, a misfire in one cylinder gave me a headache, and the car felt like it was tap-dancing when starting. I think the main reason was dirty or damaged spark plugs failing to ignite. Another possibility could be a faulty ignition coil or a stuck fuel injector preventing fuel from entering. Issues with the compression system, like worn piston rings causing air leaks and insufficient compression, unstable battery voltage affecting ignition, or a dirty mass airflow sensor sending inaccurate signals, etc., could also be the culprits. My advice is to start with the simplest checks: first inspect the spark plugs and coils, and if you have the tools, measure the voltage. Fixing it promptly can save fuel costs and prevent bigger losses. If you encounter this situation while driving, avoid stomping on the accelerator.

[OSophia]

Throughout my years of driving experience, a misfire in one cylinder is a common occurrence. It's mostly due to ignition component failures, such as burnt-out spark plugs or poor contact in the ignition coil. Fuel system issues, like clogged fuel injectors or a failing fuel pump; compression faults, such as leaking cylinder gaskets or loose piston rings; and electronic control problems like sensor failures. It's advisable to first use an OBD scanner to read the error codes and address the issue accordingly. Regular inspections of these components can help reduce the likelihood of occurrence.

[Stone]

Hey buddy, your car has a misfire in one cylinder? I suspect it could be a failed ignition coil or carbon buildup on the spark plug. It might also be a clogged fuel injector preventing fuel delivery, causing that cylinder to misfire. Other possibilities include corrupted ECU data, faulty sensor false readings, aged wiring short circuits, or vacuum leaks. Last time I fixed mine by replacing the ignition coil. Get it sorted promptly to avoid engine vibration affecting driving safety.