What are the precursors to ignition coil failure?

[RyanLynn]

Noticeable body vibration and weakened spark capability are symptoms of a faulty car ignition coil, as detailed below: When the car is idling, there is obvious body vibration. Observing the exhaust pipe outlet, you can see intermittent exhaust gas flow, accompanied by severe exhaust pipe shaking and a distinct "popping" sound. Weakened spark plug firing capability leads to increased fuel consumption and reduced power. Incomplete combustion of the air-fuel mixture due to weakened spark results in carbon deposits, which increase fuel consumption. As a core component of the engine ignition system, the car ignition coil intermittently converts low-voltage electricity into high-voltage electricity. Without the high voltage generated by the ignition coil, the air-fuel mixture in the cylinders cannot be ignited, preventing the engine from functioning properly and causing power loss. The car ignition coil is essentially a transformer. It starts with the 12V voltage from the battery but delivers tens of thousands of volts to the spark plugs. Thanks to the energy conversion by the ignition coil, the spark plugs can generate the substantial energy needed to initiate the car's motion.