What are the symptoms of a faulty engine ignition coil?

1 Answers
DeElliot
07/30/25 5:36am
There are three symptoms of a faulty engine ignition coil: 1. The vehicle body shakes noticeably at idle; 2. During driving, when the RPM is below 2500, the vehicle body shakes significantly with poor acceleration; 3. Upon opening the engine hood and observing the running engine, noticeable engine shaking is observed. Before replacing the ignition coil, carefully inspect the spark plugs, high-voltage wires, power supply voltage, and ensure good contact to guarantee the normal operation of the ignition coil. If there is no response after installing the ignition coil, it is mainly caused by insufficient contact of the low-voltage plug. Therefore, when replacing the ignition coil, mechanics must ensure that the vehicle's plug is securely inserted into the low-voltage socket of the ignition coil to guarantee reliable connection of the low-voltage link.
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