What Causes a Car Engine to Sound Muffled and Not Crisp?

[DiCaroline]

Car engine sounds muffled and not crisp due to reasons including insufficient engine power and damaged spark plugs. Details are as follows: Insufficient Engine Power: A muffled and not crisp sound from the car engine indicates insufficient engine power, often noticeable during high-speed driving or uphill, especially under heavy load. The engine power is significantly inadequate, and when accelerating by pressing the throttle, the vehicle speed does not increase rapidly. The exhaust feels heavy, the driving lacks power, and fuel consumption rises sharply. Damaged Spark Plugs: Check the power supply system to see if the spark plug's ignition head is too large, causing slow spark frequency and affecting the engine's combustion quality. Replacement is recommended.