What Causes Abnormal Noise After Accelerating the Engine?
3 Answers
Engine abnormal noise after accelerating may result from: engine knocking, insufficient engine oil, excessively low oil pressure, friction between valves and guides or hydraulic lifters, premature gasoline combustion when pistons fail to reach top dead center during compression stroke before spark plug ignition. Solutions: 1. Use gasoline with appropriate octane rating and avoid refueling at unknown gas stations; 2. When forced to use substandard fuel in extreme conditions, employ a gasoline funnel to filter out most water and impurities, thereby improving fuel quality. An engine (Engine) is a machine that converts various forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc.
Having driven for decades, I've often encountered strange noises after refueling. That time on the highway when accelerating, the noise was particularly loud. Upon inspection, it turned out to be worn and aged rubber engine mounts causing squeaking sounds from the car's vibration. Another common cause is carbon buildup or aging spark plugs, where poor ignition produces crackling detonation sounds. If the belt system is too loose, like when the tensioner pulley fails, it creates squeaky friction noises. Carbon clogging the intake manifold results in obvious buzzing sounds during acceleration due to obstructed airflow. Cracks or looseness in the exhaust system can also cause hissing noises. From my experience, immediate inspection prevents minor issues from becoming major problems—like that simple spark plug replacement which only cost a few hundred yuan. Don't wait until the noises become severe; these warning signs are crucial for safe driving. Regular maintenance such as throttle body cleaning and replacing wear-prone components can significantly reduce malfunctions. Engine health affects your family's safety—never take it lightly.
As an automotive enthusiast, I'll analyze potential causes of engine knocking noises from a technical perspective. Worn internal components like camshafts or connecting rod bearings can cause creaking sounds under load. Ignition system issues, such as faulty spark plugs failing to ignite, may lead to detonation and popping noises. Failed bearings in the pulley system can produce high-pitched squealing from friction. Fuel delivery problems like clogged injectors causing uneven supply result in engine shuddering and roaring during acceleration. Exhaust manifold leaks create hissing sounds due to changes in backpressure. Severe carbon buildup increases acceleration resistance and amplifies noise.
Inspection methods: First locate the noise source using a simple stethoscope. For prevention, regularly change oil and air filters to avoid problem accumulation. While DIY repairs like spark plug or belt replacement are manageable for minor issues, persistent knocking requires professional technician diagnosis. Never ignore unusual sounds during safe driving - they often serve as early warnings for mechanical failures.
