What Causes Increased Engine Noise and Lack of Power During Acceleration?

[MacNora]

When a car experiences sluggish acceleration accompanied by loud and muffled engine noise, these are symptoms of insufficient engine power. This condition often manifests during high-speed driving or uphill climbs, especially under heavy loads, where the engine clearly lacks power. Pressing the accelerator fails to produce a corresponding rapid increase in speed. The reasons for insufficient engine power include the following: Carbon buildup: This includes carbon deposits in the cylinders, throttle body, spark plugs, and intake system. Excessive carbon buildup reduces ignition energy and intake efficiency, ultimately leading to decreased engine power, resulting in sluggish acceleration and a muffled sound. Fuel system issues: Using incompatible fuel octane ratings can reduce the car's power output. Alternatively, blockages in the fuel tank vent, fuel tank switch, fuel filter, or fuel lines between the tank and carburetor can restrict fuel supply, leading to a lean air-fuel mixture and weak acceleration. Air intake problems: A clogged air filter due to prolonged use without cleaning restricts airflow, causing an overly rich air-fuel mixture and reduced engine power. For turbocharged vehicles, a malfunctioning turbocharger will prevent the engine from delivering power even when the accelerator is pressed. Engine overheating: Insufficient engine oil or coolant, or a malfunctioning cooling system, increases engine load and impairs heat dissipation. Overheating degrades lubrication, accelerates mechanical wear, and reduces engine power. Regular engine maintenance includes the following methods: Use the appropriate grade of lubricating oil. For gasoline engines, select SD to SF-grade oil based on the exhaust system's additional components and usage conditions. For diesel engines, choose CB to CD-grade oil according to mechanical load, ensuring it meets the manufacturer's specifications. Regularly change the oil and oil filter. Over time, lubricating oil degrades in quality, and after a certain mileage, its performance deteriorates, leading to engine issues. To prevent problems, replace the oil periodically based on usage conditions and maintain the correct oil level. As oil passes through the filter's fine pores, solid particles and sludge accumulate in the filter. A clogged filter may cause oil to bypass the filter element through the relief valve, carrying contaminants back into the lubrication system and accelerating engine wear. Periodically clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through piston ring gaps, mixing with metal particles from wear to form sludge. In small amounts, it remains suspended in the oil, but in large quantities, it clogs filters and oil passages, hindering lubrication and increasing wear. Regularly use a radiator cleaner to remove rust and scale deposits. This ensures proper engine operation and extends the lifespan of both the radiator and the engine.