What are the reasons for slow and weak motor speed?
2 Answers
When the engine speed does not increase and lacks power when accelerating, the most common reasons are a clogged fuel filter or fuel injector, which prevents the fuel pump from working properly and results in insufficient fuel pressure. In this case, the fuel filter or fuel injector needs to be replaced. The accelerator, also known as the "throttle" or "air valve," refers to the control device that regulates the engine's power (thrust). Additional information: Below are the reasons for abnormal noise from the accelerator: Carbon buildup in the throttle causing stiffness: The throttle should be cleaned. Wear of the accelerator pedal support pin: Applying grease can solve the problem; if not, replacement is necessary. Poor installation of the throttle cable: For electronic throttles, check the accelerator pedal mechanism and the accelerator pedal sensor.
I've been running an auto repair shop for over twenty years. When encountering slow and weak electric motor speed in electric vehicles, it's most likely due to a failing battery causing insufficient power supply. If the voltage drops below 12V, it won't be able to drive the motor. It could also be caused by worn bearings inside the motor, increasing rotational resistance; loose or aged wiring connections causing unstable current flow; a faulty controller unable to regulate power; or cold weather reducing battery performance, making acceleration difficult. Use a multimeter to measure the voltage and try replacing the battery. If the issue persists, you'll need to disassemble the motor to check the coils or bearings—don't attempt DIY fixes, it's better to seek a professional shop. Regular maintenance, such as frequent battery charging, can prevent major issues.
