How to Know When to Replace Spark Plugs

1 Answers
JohnFitz
07/29/25 9:41pm
Methods to determine if spark plugs need replacement are: 1. When the surface of the spark plug shows severe burning, cracking, or electrode melting, it indicates the spark plug has reached the end of its lifespan and needs replacement; 2. Keep the car idling. If the engine exhibits intermittent or continuous shaking and emits abnormal "popping" sounds, it suggests a possible issue with one of the spark plugs, which then requires replacement. Spark plugs, commonly known as igniters, function by discharging high-voltage pulses from the ignition wires, breaking down the air between the two electrodes to generate an electric spark, thereby igniting the air-fuel mixture in the cylinder.
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