What are the signs of a bad ignition coil?

[StNevaeh]

Car symptoms of a bad ignition coil: 1. At idle, the car body shakes noticeably. You can observe the exhaust pipe outlet, where the exhaust gas flow shows obvious intermittency, accompanied by severe exhaust pipe shaking and clearly audible popping sounds; 2. While driving, when the RPM is below 2500, the car body shakes noticeably with weak acceleration, but the shaking disappears once the RPM exceeds 2500; 3. Open the engine hood and observe the running engine, you'll notice significant engine shaking that clearly exceeds normal operational vibrations, with a large shaking amplitude.

[Trenton]

After driving for so many years, it's really annoying when the ignition coil fails. The engine starts shaking badly, especially when waiting at a red light or driving at low speeds. It feels like the whole car is wobbling, as uncomfortable as sitting on a massage chair. There's a noticeable drop in power, making it particularly difficult when climbing hills. Even with the accelerator pedal floored, the car still moves sluggishly, and fuel consumption quietly creeps up. I carefully calculated that it burns an extra two to three liters per hundred kilometers on average. The most annoying part is the engine warning light constantly glaring, reminding you that trouble is coming. If not repaired promptly, it can also damage other components, such as burning out spark plugs or causing issues with the catalytic converter, potentially doubling or more the repair costs. So, I always recommend that once you notice these symptoms, don't hesitate—head straight to a professional auto repair shop for a check-up. After replacing the ignition coil, everything runs much smoother.

[LeClayton]

Faulty ignition coils pose a hidden danger to safe driving. I once experienced sudden engine stalling on the highway - a terrifying feeling where power instantly cuts out and the car feels dangerously floaty. In daily driving, unstable idling or frequent vibrations, especially during cold starts, are more noticeable and can easily distract you, potentially leading to accidents. Increased fuel consumption may seem minor, but delaying repairs could trigger more severe mechanical failures. When the engine warning light comes on, I know it's serious - not a trivial issue. Pull over immediately for inspection or call for assistance; never push through. For prevention, have technicians test the ignition system during regular maintenance to avoid such problems, ensuring safe and worry-free journeys.

[SanAngelina]

As a car enthusiast, the most obvious symptom when the ignition coil fails is severe engine shaking, especially noticeable during acceleration or climbing hills, where the car jerks and lacks smoothness. The idle is also unstable, sometimes even stalling, which is quite frustrating. For a simple self-check, you can use an OBD tool to read the fault codes or try unplugging the coil connector to check for sparks. The repair isn't too expensive, but delaying it leads to a significant increase in fuel consumption, which hits the wallet hard. Once these symptoms appear, I immediately replace the part or take it to a small shop for repairs to avoid bigger issues that could affect the entire system's operation.