What are the reasons for the Ford Focus not accelerating when the throttle is pressed?

[OLaura]

Below are the reasons why the Ford Focus may not accelerate when the throttle is pressed: 1. When the throttle is pressed, the cable moves the throttle valve, which is equipped with a position sensor. The control unit uses the signal from the throttle position sensor to determine the opening of the throttle valve, calculates the corresponding signal voltage, and then determines the fuel injection amount based on this voltage. If the throttle position sensor is dirty or the voltage is imbalanced, it can cause an electronic throttle malfunction, resulting in the vehicle not accelerating even when the throttle is fully pressed. 2. If electronic throttle issues are ruled out, the problem may lie in the engine's intake, fuel system, or ignition system. The throttle position sensor signal is crucial for the engine's normal operation, which requires sufficient air. If the intake system has leaks or blockages, pressing the accelerator may lead to reduced power, inability to increase RPM, and vehicle shaking. 3. The engine's fuel system is critical. Using poor-quality gasoline can damage the fuel pump, cause catalytic converter failure, piston issues, etc., directly affecting engine power and leading to engine stalling or failure to accelerate.