What is the cause of catalytic converter damage and three-cylinder misfire?

2 Answers
OAdeline
08/26/25 3:22am
Catalytic converter damage and three-cylinder misfire are caused by ignition coil and cylinder wire failures. Below are specific details about the three-way catalytic converter: 1. Introduction: The three-way catalytic converter is an external purification device in the vehicle's exhaust system. Since the catalyst is primarily composed of three precious metals and can catalyze the three most harmful substances through oxidation and reduction reactions, it is appropriately called 'three-way'. 2. Maintenance method: Reduce idle time while driving, as prolonged idling increases the internal temperature of the engine. The catalytic converter has a temperature limit, especially in summer when temperatures are naturally higher than usual. Therefore, it's important to avoid idling for more than 10 minutes.
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LaCora
09/08/25 3:52am
Oh dear, issues with catalytic converter damage and three-cylinder misfire are usually interconnected. A three-cylinder misfire refers to abnormal ignition in one of the engine's cylinders, which could be caused by worn spark plugs, faulty ignition coils, or damaged high-voltage wires leading to poor combustion. Unburned fuel entering the exhaust system can contaminate and clog or damage the catalytic converter. During inspection, start with the ignition system to check if the spark plugs are heavily carbon-fouled or have incorrect gaps, and perform a compression test to detect any air leakage issues. A burnt-out ignition coil can also directly cause cylinder misfires. If the catalytic converter is damaged, there are usually abnormal noises or unusual odors coming from the exhaust. It's advisable to seek professional diagnosis as soon as possible to prevent overall engine damage. Delaying repairs can lead to increased fuel consumption, reduced acceleration power, and even environmental fines. In short, don't ignore small warning signs—safety first!
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