An ignition coil can fail devido a varios fatores. One reason could be overheating, which usually ruins the insulation and damages the coil’s windings. In addition, the failure of an ignition coil can also be caused by some form of electrical failure, like a short circuit or bad wiring in the ignition system. Some internal parts of the ignition coil may also fail because of old age or damage, resulting in reduced performance or complete failure. In terms of symptoms, the failure of ignition coils may be shown by misfires, lack of smooth acceleration, low power, and the starting problems with the engine. Ignition coils are often overlooked, yet the precise tests will help solving many issues related with the performance of the engine.