How to Determine if the Ignition Coil is Damaged?

1 Answers
McChristopher
07/30/25 5:44am
Methods to determine if the ignition coil is damaged include: 1. At idle, the vehicle body shakes noticeably, and the exhaust gas flow from the tailpipe shows obvious intermittency, accompanied by severe tailpipe vibration; 2. While driving, when the RPM is below 2500, the vehicle body shakes noticeably with poor acceleration, but the shaking disappears once the RPM exceeds 2500; 3. Opening the engine hood reveals significant shaking of the running engine. Reasons for ignition coil damage include: 1. Design and manufacturing issues with batch spare parts; 2. The thermal effect of current damaging the coil insulation inside the ignition coil; 3. Overheating of the engine, which melts the coil insulation varnish; 4. Excessive spark plug electrode gap, increasing the load on the ignition coil; 5. Open circuit in the high-voltage wire.
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