What are the reasons for a car's ignition missing one cylinder not working?

[DerekLynn]

There are many factors that can cause an engine to miss a cylinder. Here are several reasons why a car's cylinder may not be working: 1. The fuel injector of a certain cylinder is clogged, stuck, or has poor atomization, or the high-pressure fuel pipe is broken; 2. The intake and exhaust valves have too much working clearance or are even broken; 3. The piston ring is broken or stuck, causing cylinder scoring or even cylinder barrel damage and air leakage. Here are some inspection and handling methods: 1. Check the spark plugs and cylinder wires. 2. Perform a fuel pressure system inspection. Check the fuel pressure gauge and fuel pressure gauge components, and connect the fuel pipe and gauge. Start the engine and let it idle. The fuel gauge reading should be within the range of 270~320 kpa. 3. Check each cylinder's fuel injector. Let the engine idle, and disconnect each fuel injector plug one by one to check if there is any change in idle speed. If the idle speed decreases similarly when each cylinder's fuel injector is disconnected, it indicates that all fuel injectors are working normally. 5. Inspection of the fuel pump and its circuit. Fuel pump inspection: Unscrew the fuel tank cap. When the ignition switch is in the ON position, you can hear the sound of the fuel pump operating at the fuel filler port. Under normal working conditions, the fuel pump should operate for 2 seconds when the ignition switch is in the ON position. If the fuel pump does not operate, first check if the fuel pump fuse is blown. Check for continuity between the PGM-FI main relay and the connector terminals, etc.

[JakeLee]

I've encountered the issue of a car missing one cylinder several times, where the engine shakes violently while driving. The most common causes are a faulty spark plug or excessive carbon buildup, preventing ignition. I suspect you might have overlooked the spark plug's lifespan or loose wiring connections—older cars can jostle the connections loose. There's also the issue with the ignition coil; if it's short-circuited, the current won't reach the cylinder. Fuel supply problems can arise too—clogged fuel injectors starve the cylinder of fuel. Compression leaks, like a blown head gasket, prevent proper combustion. Faulty sensors in the electronic control system, such as an inaccurate crankshaft position sensor, can cause the ECU to misfire commands. I recommend starting with a spark plug check—it's simple and straightforward; replacing them yourself isn't hard, but be careful not to damage the engine. Regular maintenance, like cleaning carbon deposits, can prevent misfires and shaking. Ignoring the issue accelerates engine wear, increases fuel consumption, and poses significant safety risks.

[Willow]

The causes of engine misfire are quite systematic: damaged spark plugs are key—they fail to ignite when aged or dirty. Faulty ignition coils are also common; unstable output prevents the cylinder from working. Fuel system issues like clogged injectors or insufficient fuel pump pressure lead to cylinder starvation. Compression problems such as leaking head gaskets or worn piston rings result in poor sealing and incomplete combustion. Faulty electronic components like ECU sensors can misalign ignition signals. During troubleshooting, use diagnostic tools to read codes and start with spark plugs and coils. Prompt repairs prevent engine damage and costly catalytic converter replacements, ensuring the car runs well and safely.

[XavierMarie]

The issue of cylinder misfiring is quite interesting—there are various causes such as burnt or carbon-fouled spark plugs leading to poor ignition, short circuits in ignition coils causing abnormal current. Clogged fuel injectors result in insufficient fuel supply, and compression leaks like cracked cylinder heads allow gas to escape. Faulty sensors can confuse the computer, causing the cylinder to stop working. Simply checking the condition of the spark plugs allows for a DIY inspection, but safety comes first—address the problem early.