What are the symptoms of a bad ignition coil in a car?

[ZoeyFitz]

The symptoms of a bad ignition coil in a car are: The cylinder corresponding to the faulty ignition coil will stop working, causing rough idling, lack of power when accelerating, inability to increase speed, the illumination of the check engine light, and ignition coil leakage. During idling, the engine may or may not shake, but it will definitely shake and lack power when accelerating. Sometimes, the engine may experience power interruption during acceleration, leading to weak acceleration and shaking. Additionally, when a cylinder misfires, the air-fuel mixture in that cylinder cannot be ignited and will be expelled through the exhaust pipe. However, since the exhaust pipe is very hot, the mixture will combust upon reaching the exhaust pipe due to the high temperature. This combustion generates a large amount of heat, which can clog the pores of the three-way catalytic converter in the exhaust pipe, causing it to fail.