How is the car accelerator sinking (it feels heavy to step on the accelerator)?

How is the car accelerator sinking (it feels heavy to step on the accelerator)? The accelerator sinks because:

1, the booster part is broken;

2, the transmission part is blocked, or the friction becomes larger;

3. The throttle is dirty. The accelerator is generally controlled by the pedal, also known as the accelerator pedal, which is a device to control the fuel supply of the vehicle engine. The operation of the accelerator pedal should be based on the right heel stepping on the cab floor as the fulcrum, and the sole of the foot lightly stepping on the accelerator pedal, stepping down or relaxing with the extension and flexion of the ankle joint. When stepping on the accelerator pedal, the force should be gentle, so that you can step on it gently and lift it slowly. During operation, the throttle should be increased or decreased according to the road conditions and actual needs, and the appropriate gear should be selected to make the engine run at medium speed and large throttle most of the time to save fuel.

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