What are the symptoms of a faulty vehicle high-voltage line?
2 Answers
The symptoms of a faulty vehicle high-voltage line are: 1. The spark released by the spark plug will appear dark yellow and lack sufficient energy, making it difficult to effectively ignite the air-fuel mixture; 2. The spark plug electrodes may fail to release sparks, preventing the air-fuel mixture from burning and resulting in engine misfire. Engine misfire leads to reduced power, increased fuel consumption, and noticeable vibration and noise. Prolonged fuel injection without ignition in the engine cylinder can also cause gasoline flooding. Symptoms of ignition coil failure: 1. At idle, the vehicle body shakes noticeably; 2. While driving, when the engine speed is below 2500 RPM, the vehicle body exhibits significant shaking and weak acceleration; the shaking sensation disappears once the speed exceeds 2500 RPM. 3. Upon opening the engine hood and observing the running engine, noticeable engine vibration can be detected.
What troubles me most about a faulty high-voltage line in the car is that it becomes extremely difficult to start, especially during cold mornings when it takes multiple attempts to fire up. After starting, the engine constantly shakes, making the whole car vibrate like a tiny massager on the driver's seat—utterly annoying. During acceleration, there's a complete lack of power, with delayed throttle response that makes overtaking a struggle, while fuel consumption keeps climbing. Once, while driving in the rain with a damaged high-voltage line, the situation worsened—the engine sound became uneven, and I nearly broke down midway. I recommend checking promptly if these symptoms appear. Don't wait until the spark plugs get damaged like I did—it's both costly and dangerous. During routine maintenance, periodically inspect the wiring harness for signs of aging.
