When to Replace Spark Plugs?

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Replacement cycle for spark plugs: Ordinary nickel alloy spark plugs need to be replaced approximately every 20,000 kilometers, platinum alloy spark plugs should be replaced around 40,000 kilometers, and iridium spark plugs can be replaced between 60,000 to 80,000 kilometers. Signs that spark plugs need replacement: 1. Difficulty starting the vehicle; 2. Engine idling roughly; 3. Weak vehicle acceleration. Spark plugs are a crucial component of the gasoline engine ignition system. They introduce high voltage electricity into the combustion chamber and cause it to jump the electrode gap to create a spark, thereby igniting the combustible air-fuel mixture in the cylinder. Spark plugs mainly consist of a terminal nut, insulator, terminal stud, center electrode, side electrode, and shell, with the side electrode welded to the shell.