What Causes Loud Noise When Accelerating the Car?
3 Answers
Possible reasons for loud noise when accelerating the car include a loose exhaust pipe, excessive engine oil, incorrect engine oil type, or internal engine issues. Loose exhaust pipe: If the exhaust pipe connected from the air intake grille to the air filter is loose, it will produce loud noise when accelerating. The pipe should be secured with tape. Excessive engine oil: Adding too much engine oil increases resistance when the car is under load, reducing power output and causing louder noise during acceleration. Always monitor the oil level when refilling. Incorrect engine oil type: Using the wrong oil type can severely damage the engine and cause loud noise when accelerating. Never mix different oil types or use incompatible oil. Internal engine issues: These may lead to exhaust pipe blockage, resulting in louder noise during acceleration. Owners should promptly visit a 4S shop for inspection.
Last time my old car would roar scarily when I stepped harder on the gas pedal. Turned out it was due to an aging exhaust manifold gasket leaking air. If it's the intake manifold leaking, it can also cause this, especially when rubber hoses crack after years of use. Another common issue is a dirty, clogged air filter choking the engine, making it scream. The worst is when there's a hole in the muffler – the noise is like a tractor. I remember once finding loose mounting bolts causing the whole car to shake from vibrations. Don't delay fixing these issues; it's best to get them checked at the repair shop early. After all, it's both annoying to hear and wastes fuel.
My modified car roars like a race car when I floor the accelerator. Actually, anyone who has modified their exhaust system knows that switching to a straight pipe or increasing the pipe diameter can easily cause this. For stock vehicles, focus on three key points: Check for air leaks in the intake pipes—I've tested with soapy water, and bubbles will appear if there are cracks in the rubber hoses; loose exhaust manifold bolts can produce a metallic rattling sound; a clogged catalytic converter will prevent the RPM from rising and make the engine unusually loud. Worn-out spark plugs causing poor ignition can also make the engine struggle and roar. Actually, bad wheel bearings can produce a humming noise that syncs with the throttle position.
