Coil breakdown: no high voltage output, no ignition;

Coil short circuit: the voltage is too low and the energy is insufficient; the carbon deposition on the spark plug electrode turns black, and the engine vibrates seriously;

Surface discharge: ignition coil is burnt out;

Poor insulation: due to vehicle vibration, high and low temperature changes of engine and corrosive environment, insulating materials lose their due insulation (vulnerable parts);

Spark plug: if the electrode gap is too large, the booster load of ignition coil will be increased, and the high voltage coil will be broken down, resulting in short circuit or open circuit

The ignition coil is very important for the ignition system. In the daily maintenance of the ignition system, the owner should not leave the ignition coil aside while paying attention to the spark plug and other accessories.