What Causes Loud Engine Noise and Poor Acceleration?

1 Answers
VanDylan
07/29/25 4:14pm
Loud engine noise and poor acceleration are typically caused by excessive carbon buildup in the engine or prolonged failure to change the engine oil. Over time, carbon deposits will accumulate in the engine, affecting its normal operation. Engines have a specific compression ratio, and if carbon builds up on the piston crown, it increases the engine's compression ratio. This elevated compression ratio can lead to engine knocking during operation, resulting in reduced power output and increased fuel consumption. Engine oil serves multiple functions including lubrication, cleaning, sealing, heat dissipation, cushioning, and rust prevention. If the oil is not changed for an extended period, it will increase the engine's operational resistance and accelerate engine wear.
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