What Causes Slow and Weak Acceleration in Civic?

[MasonMarie]

Civic's slow and weak acceleration can be attributed to the following reasons: Severe Engine Carbon Deposits: When there is excessive carbon buildup inside the engine, the gasoline sprayed by the cold start injector is largely absorbed by the carbon deposits. This results in an overly lean air-fuel mixture during cold starts, making ignition difficult. In such cases, the engine only starts easily after the carbon deposits become saturated with gasoline. Once started, the gasoline adsorbed on the carbon deposits is drawn into the combustion chamber by the engine's vacuum suction, causing the air-fuel mixture to become too rich. This fluctuation between lean and rich mixtures leads to rough idling after a cold start. Aging Engine Components: Car shaking is also related to worn engine mounts. Engine mounts act as the vibration damping system for the engine, absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations are transmitted to the steering wheel and cabin, causing shaking during idle.