What Causes the Buzzing Noise at 110-120 km/h on the Highway?
2 Answers
Running at 110-120 km/h on the highway with a buzzing noise can be attributed to the following reasons: 1. Engine knocking: Caused by the use of substandard or low-grade fuel. 2. Incorrect engine timing control: Such as an excessively advanced ignition timing, which requires readjustment. 3. Excessive carbon buildup inside the engine: Initial attempts can be made with carbon cleaning without disassembly or by driving at high speeds to test the cleaning effect. Otherwise, disassembling the engine for carbon cleaning may be necessary, often accompanied by severe oil burning in more serious cases. 4. Engine misfire: If one cylinder is not functioning, the engine becomes unbalanced, leading to abnormal noises, along with severe shaking, lack of power, and other malfunctions. This could be due to faults in the ignition module, spark plugs, or fuel injectors, requiring replacement of the corresponding parts.
I've seen many similar issues where a buzzing noise at 110-120 km/h on the highway is very likely caused by worn wheel bearings. Bearings operating at high speeds for extended periods experience increased friction, generating noise, and 110-120 km/h happens to be the resonant frequency point. Tire problems can also produce similar sounds, such as irregular tire wear or incorrect tire pressure causing high-speed resonance. I recommend first identifying whether the noise is coming from the front or rear wheels; severely damaged bearings can cause the wheel to lock up or even detach, which is extremely dangerous. Another possible cause is the vehicle's resonance point—aging suspension or an unbalanced driveshaft can also trigger this phenomenon. Don't delay—visit a professional shop as soon as possible for inspection and part replacement, and get a wheel alignment to ensure overall safety. Regular maintenance focusing on bearing and tire conditions can effectively prevent such issues.
