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.