First of all, our ignition coil is mainly composed of a primary coil, a secondary wire and a core. It is mainly used in the ignition system to make the low-voltage electricity high-voltage by the ignition coil, so that the spark plug generates electric spark. So after understanding its components and how it works, let's start with these two aspects and analyze the causes of damage to the ignition coil.

(1) The engine does not work, and the ignition switch has not been turned off for a long time, and the coil insulation in the ignition coil is destroyed due to the thermal effect of the current.

(2) The engine is overheated and the coil insulation paint is baked and fails.

(3) The spark plug electrode gap is too large, increasing the load of the ignition coil, causing the high voltage coil to break down, causing a short circuit or an open circuit.

(4) The high-voltage line is broken, so that the generated high-voltage power has no way to pass, and it is easy to cause the high-voltage coil to be broken. At this time, the engine is not easy to start, and it should be checked whether the high voltage line is open.  Then the old driver who often drives the car may know that the most obvious feature of the ignition coil fault is the lack of cylinder. There may be obvious sudden sounds under the idle speed. The hand feels most obvious on the exhaust pipe, accompanied by the engine shaking. At this time we have to park the car in a safe place to check the ignition coil, and then continue to go on the road without any problems.