Why Do Ignition Coils Fail?

[DeArya]

An ignition coil consists of a primary coil, secondary coil, magnetic core, switching transistor, and other auxiliary components. The main reasons for ignition coil failure are as follows: 1. High external ambient temperature: Excessive heat can cause the ignition coil to overheat. You can use a wet cloth to gradually cool it down. 2. Overheating of the car engine: If the coil is installed too close to a heat source or has poor heat dissipation, the overheating issue should be resolved, and the coil should be installed farther away from the engine. 3. Improper ignition coil wiring and excessively high generator voltage regulation: Incorrect wiring on the ignition coil may render the additional resistor ineffective, causing the coil to heat up at low engine speeds. If the regulator voltage is set too high, excessive primary current can lead to increased output voltage and coil overheating. 4. Mismatch between the ignition coil and the engine: When replacing the coil, ensure it is compatible with the vehicle model. 5. Poor-quality coils or internal short circuits causing overheating: During vehicle use, forgetting to turn off the ignition switch while parked can result in prolonged power supply. Loose carbon particles in the distributor may cause continuous sparking, leading to overheating, insulation erosion, or even explosion of the ignition coil.