Common fault of automobile high voltage circuit

High tension line loss or leakage; Distributor cap burst breakdown; The distributor rotor ablation burst breakdown; The spark plug electrode gap is too big or too small; The spark plug carbon deposit too much; The spark plug insulator damage; Ignition coil damage or connection loss. The failure of high voltage circuit is used mostly high pressure test method, the high tension line distributor center or a cylinder under the high tension line drawing, place the thread from 3 - cylinder body 6 mm, try starting the engine fire, sparks and strong, shows that the ignition system working properly.