What symptoms will a car show if the ignition coil is broken?
2 Answers
Symptoms of a broken ignition coil in a car: 1. The body shakes noticeably when idling; 2. While driving, when the speed is below 2500 rpm, the body shakes noticeably and acceleration is weak; 3. Opening the engine cover and observing the running engine reveals obvious shaking. Causes of ignition coil failure: 1. Short circuit in the spark plug, leading to increased current in the ignition coil and a short circuit; 2. Excessive carbon buildup on the spark plug, increasing the load on the ignition coil, leading to failure after prolonged overload operation; 3. Short circuit of the high-voltage wire to ground, causing increased current in the ignition coil and a short circuit; 4. Open circuit in the high-voltage wire, preventing the high voltage generated by the ignition coil from being released, leading to voltage buildup and discharge to ground, causing failure; 5. High power supply voltage, resulting in excessive current in the primary circuit, abnormal heating, and causing the ignition coil to burst.
I once encountered an issue with the ignition coil. After starting the car, the engine shook noticeably, especially when accelerating, and it felt like there was a lack of power. The engine light also came on. Upon inspection, it turned out the coil was faulty, causing irregular ignition. Driving with this issue led to a significant increase in fuel consumption and could cause emissions to exceed standards, with black smoke occasionally coming from the exhaust pipe. If not repaired promptly, the engine internals could be damaged, potentially ruining the spark plugs or other components, leading to more expensive repairs. That time, I spent some money to replace the new coil, and everything returned to normal. I recommend going to a repair shop for a check as soon as you notice similar symptoms to avoid bigger troubles. Shaking during high-speed driving can also affect handling safety, which is very dangerous.
