What are the reasons for the frequent failure of ignition coils?
2 Answers
The reasons for frequent failure of ignition coils: 1. Batch spare parts design and manufacturing issues causing ignition coil damage; 2. The thermal effect of current damaging the coil insulation in the ignition coil; 3. Engine overheating, causing the coil insulating varnish to melt and fail; 4. Excessive spark plug electrode gap, increasing the load on the ignition coil and causing the high-voltage coil to break down, resulting in short circuits or open circuits; 5. High-voltage wire open circuit, making the generated high-voltage electricity have no path to flow, easily causing the high-voltage coil to break down. The ignition coil consists of the primary coil, secondary coil, magnetic core, switching transistor, and other auxiliary components. The primary coil is usually supplied with 12V power by the main relay, the secondary coil discharges to the spark plug for ignition, and the transistor is responsible for switching.
I know exactly how it feels when ignition coils keep failing. Last time, the mechanic told me there are several common causes: using spark plugs with incorrect specifications, where an overly large gap forces the coil to work under excessive load; high engine temperatures causing the coil's rubber insulation to degrade; wiring issues like loose connectors leading to electrical arcing that damages the coil; and worst of all, installing low-quality aftermarket coils with ridiculously short lifespans. Also, frequent short trips in the city where the engine doesn't fully warm up leads to carbon buildup, which can mess with the ignition system. Now, I always ask the mechanic to check these areas—prevention is way better than repair.
