What causes the lack of power during acceleration in a Focus?

[AdalineAnn]

Ford Focus experiencing lack of power during acceleration may be caused by the following reasons: 1. Carbon deposits: These include carbon buildup in cylinders, throttle body, spark plugs, and intake system. These components are directly related to engine power output. Excessive carbon deposits inside the engine will reduce ignition energy and intake efficiency, ultimately decreasing engine power and causing shaking with poor acceleration. 2. Air intake: If the air filter becomes clogged due to prolonged use without cleaning, insufficient air volume will create an overly rich fuel-air mixture, leading to reduced engine power. For turbocharged models, if the turbocharging system malfunctions, the engine will remain sluggish and fail to deliver expected power even when the accelerator is pressed.