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What Causes a Car to Not Accelerate When Pressing the Gas Pedal?

1 Answers

OMariana

07/29/25 7:26pm

Reasons why a car does not accelerate when pressing the gas pedal: The issue of not gaining speed when stepping on the gas pedal is related to the powertrain system. The power source of a car comes from the engine, which requires the coordinated operation of air supply, fuel delivery, and ignition provided by various components. Any problem in these aspects can lead to reduced engine power, shaking, and abnormal noises. Modern cars use an electronic throttle system, where the driver operates the accelerator pedal, and the accelerator pedal position sensor generates corresponding voltage signals sent to the throttle control unit. After processing these signals, the control unit calculates the basic torque demand of the engine, determining the desired throttle opening angle. If any sensor sends incorrect signals during this process, the control unit may misjudge the car's operating conditions, resulting in the car not accelerating when the gas pedal is pressed.

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