What Causes Loud Engine Noise and Weak Acceleration?

1 Answers
LeEva
07/30/25 8:21am
Engine noise and weak acceleration can be caused by: 1. Carbon buildup: Excessive carbon deposits inside the engine reduce ignition energy and intake efficiency, leading to decreased engine power, resulting in sluggish acceleration and muffled sounds; 2. Fuel system issues: Using incompatible fuel grades (e.g., using 90 octane instead of 93 octane) reduces vehicle power output and performance; 3. Air intake problems: As air is one of the engine's power sources, a clogged air filter from prolonged use without cleaning can cause insufficient airflow, leading to an overly rich air-fuel mixture and reduced engine power; 4. Engine overheating: Insufficient engine oil, low coolant levels, or faulty cooling system components can increase engine load and cause poor heat dissipation.
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