What Are the Symptoms of a Faulty Ignition Coil in a Car?
2 Answers
Symptoms of a faulty ignition coil in a car: 1. At idle, the vehicle body shakes noticeably. Observing the exhaust pipe outlet, the exhaust gas flow exhibits obvious intermittency, accompanied by severe exhaust pipe vibration and clearly audible popping sounds; 2. During driving, when the engine speed is below 2,500 rpm, the vehicle body experiences obvious shaking with poor acceleration. The shaking sensation disappears once the speed exceeds 2,500 rpm; 3. Upon opening the engine hood and observing the running engine, noticeable engine vibration can be seen. This vibration significantly exceeds the normal operating vibration range of an engine, with considerably large amplitude.
I once encountered a situation where the ignition coil failed during a car repair, and the car was noticeably running poorly. The engine would misfire, and during acceleration, the car would shake like a sieve, feeling sluggish and powerless. Even at idle, the seat would vibrate, which was quite irritating—this is usually caused by insufficient spark ignition. Fuel consumption also skyrocketed because the unburned air-fuel mixture was wasted, leading to very low efficiency. What’s even more annoying is that the check engine light would often come on, reminding me to address the issue promptly. Delaying repairs could easily damage the catalytic converter, making repairs even more expensive. It’s best to have it checked and replaced by a professional shop at the first sign of trouble to avoid a breakdown mid-drive and ensure safe driving.
