Why does the car jerk when accelerating while driving?
2 Answers
Long-term short-distance driving, poor air and fuel quality, and an older vehicle. Below is relevant information about refueling cars: Precautions: Before driving, check the fuel gauge and calculate whether refueling is needed during the trip based on the distance and the fuel gauge reading. It's advisable to refuel in advance rather than waiting until the fuel warning light comes on. The fuel pump is located inside the fuel tank and operates at high temperatures during continuous use. Being submerged in fuel helps effectively cool it down. Reminder: When the fuel warning light comes on, it indicates the fuel level is below the fuel pump. Consistently waiting until the light comes on to refuel will shorten the fuel pump's lifespan. Too little fuel in the tank may even cause the fuel pump to burn out. It's better to refuel in the morning or evening, avoiding the hot midday sun and high temperatures. This is because gasoline is billed by volume rather than weight, and it expands with heat and contracts with cold.
I also experienced acceleration hesitation issues when driving an older car. At first, I thought the throttle pedal was stuck, but later discovered there could be multiple causes. It might be severely carbon-fouled spark plugs causing unstable ignition and intermittent power delivery; for automatic transmissions, dirty transmission fluid or torque converter failure can cause slippage during gear shifts leading to hesitation; insufficient fuel pump pressure or clogged fuel injectors from impurities can also make acceleration uneven; additionally, a dirty or faulty mass airflow sensor can affect engine response due to inaccurate air intake. I recommend first checking the spark plugs and fuel system – regular maintenance can prevent these issues. If you notice worsening hesitation during daily driving, get it professionally diagnosed immediately to prevent minor issues from becoming major failures, such as drivetrain wear increasing fuel consumption or potentially causing loss of control during sudden acceleration.
