What are the symptoms of a damaged car high-voltage wire?
4 Answers
Symptoms of damaged car high-voltage wire: 1. Electric leakage; 2. Reduced engine power, specifically manifested as jerking at low speeds; 3. Difficulty starting; 4. Severe engine vibration; 5. Misfiring, the car jerks when accelerating suddenly and consumes more fuel; 6. Occasional misfiring. The car's high-voltage wire transmits electrical energy from the ignition coil to the spark plug for ignition, enabling the engine to function. It is an insulated wire with a simple structure: a metal conductor inside wrapped with a high-strength insulator through a production process, ensuring good insulation and conductive performance under both high and low temperatures.
Recently I noticed the car's high-voltage ignition wires are damaged, making it particularly difficult to start the engine - sometimes requiring repeated key turns to ignite. While driving, the engine shakes violently, almost like a person shivering, clearly indicating power transmission issues. Additionally, there's noticeable lack of power when accelerating uphill, with no response to throttle input, which is extremely frustrating. Fuel consumption has also increased significantly, requiring frequent refueling despite full tanks. The most annoying part is the frequent illumination of the check engine light on the dashboard, which always makes me nervous. I recall the mechanic mentioning last time that high-voltage wires are prone to aging and electrical leakage, especially vulnerable to damage from rainwater or high temperatures, causing spark plug ignition failures. I recommend immediately inspecting the wires for cracks upon noticing these symptoms and replacing them promptly to avoid bigger troubles. Regular maintenance should also pay attention to the ignition system to prevent sudden breakdowns affecting safety.
My car once experienced a high-voltage wire failure, with quite noticeable symptoms. During startup, the car would wheeze but just wouldn't ignite. When driving, the engine shook violently, almost making the steering wheel vibrate off. Acceleration felt weak, like stepping on cotton, and even climbing a small slope was a struggle. Later, I noticed the fuel consumption had increased significantly, costing me much more than usual. One time, the dashboard warning light came on, and concerned about safety, I pulled over immediately to check. Upon closer inspection, the wire insulation was damaged, likely due to aging or high temperatures. I tested it myself with a multimeter and found abnormal resistance, confirming a high-voltage short circuit. The mechanic said this could cause the spark plugs to malfunction and, in severe cases, could lead to a fire. So don't delay—get to a professional shop and replace the wires as soon as possible.
When the car's high-voltage wires are damaged, it's extremely uncomfortable to drive. Starting is difficult and the engine often stalls. On the road, the engine shakes so much that the seats vibrate, and the car feels powerless—stepping on the gas pedal doesn't help. Fuel consumption increases noticeably, costing hundreds more in gas each month. Once on the highway, I noticed the dashboard warning light turned red, which scared me into pulling over. The cause was aging wires leaking electricity, preventing the spark plugs from igniting, leading to engine failure. A quick diagnosis can be done by checking for damaged wire insulation. Ignoring it can increase engine load and cause long-term damage to parts. Regular maintenance is simple—just visually inspect the wires, and don't wait until the problem worsens.
