
Car igniters should be replaced approximately every 100,000 kilometers. As a core component in the engine ignition system, the igniter primarily functions to intermittently convert the vehicle's low-voltage electricity into high-voltage electricity. Without the high-voltage electricity converted by the igniter, the combustible gas mixture in the cylinder will not be effectively ionized and ignited, rendering the engine unable to operate normally. Precautions for using the igniter: 1. Do not turn on the ignition switch when the engine is not running; 2. The external surface of the igniter should be kept clean, and the interior should be protected from moisture to maintain its good insulation performance; 3. For contact-type battery ignition systems, the ignition switch should be promptly turned off when the gasoline engine stops running, and the gasoline engine should be started immediately when the ignition switch is turned on.

I didn't change my spark plugs until my car had almost 70,000 kilometers on it. Before that, the engine would occasionally hesitate when starting. The mechanic said regular nickel alloy spark plugs typically need replacement around that mileage. Later I switched to iridium ones, which are said to last about 100,000 kilometers. Actually, the lifespan depends on the material and driving habits - highway driving causes less wear, while constant stop-and-go traffic wears them out faster. The key is not to wait until they completely fail before replacing them; changing them a bit earlier is better for the engine too.

The maintenance manual recommends replacing spark plugs at 50,000 kilometers for optimal performance, but I've found that it really depends on the specific situation. Recently, my car was jerking during acceleration and fuel consumption increased. After inspection, it turned out the gap in the OEM spark plugs had widened, affecting ignition efficiency. Different materials have vastly different lifespans: standard copper-core plugs may need replacement every 30,000-40,000 km, while platinum or iridium ones can last 60,000-100,000 km. Experienced mechanics suggest checking electrode wear every 30,000 km for reliability.

Spark plug replacement intervals vary by material: nickel alloy lasts 30,000-50,000 km, platinum 60,000-80,000 km, and iridium can exceed 100,000 km. Last time I didn't replace them on time, which resulted in difficult cold starts and severe shaking, costing me more in repairs. Modified cars or turbocharged engines consume spark plugs faster, so early replacement is recommended. During major maintenance, always have the mechanic check the electrode color - a whitish appearance indicates it's time for replacement.


