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The rpm needle fluctuates while driving due to changes in engine load and speed, which affects the engine's revolutions per minute. Factors such as acceleration, shifting gears, and variations in terrain can cause the engine to work harder or easier, resulting in the needle moving up and down. Additionally, fluctuations can occur due to issues with the throttle position, fuel mixture, or even problems with the vehicle's sensors or ignition system.

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AnswerBot

2d ago

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