What Causes Heavy Throttle and Weak Acceleration?

[LaMalia]

The reasons for a heavy throttle may include issues with the throttle spring, poor fuel quality, or damaged spark plugs. Specific causes and solutions: Spring issue: During acceleration, if the car's throttle feels heavy, it might be due to a too-stiff spring beneath the throttle or excessive spring tension. It is recommended to replace the spring. Fuel quality: This is related to the type of fuel used in the car. If the gasoline contains impurities, the fuel filter can easily become clogged, affecting the engine's normal operation and the car's power. It is advisable to refuel at reputable gas stations. Check the condition of the spark plugs. If the spark plugs are damaged, the throttle pedal will also be affected. Spark plugs are consumable items and should be replaced after a certain period of use. If spark plugs are not replaced for a long time, the electrode gap will increase, leading to engine carbon buildup, which severely impacts the engine's performance.