Why Does an Automatic Transmission Car Experience Jerking When Accelerating?

[SanJuliana]

Automatic transmission cars may experience jerking when accelerating due to using the wrong fuel, or issues with the engine's intake system, ignition system, or fuel pump. Causes of using the wrong fuel: Using lower-octane gasoline may result in weak acceleration, reduced engine power, increased fuel consumption, and subsequently affect the engine's oil system. The importance of engine oil cannot be overstated—it ensures proper lubrication, reduces vibration, and enhances engine smoothness. Issues with the engine intake system: Besides fuel, the engine requires air. If components like the air filter or throttle body are clogged or malfunctioning, leading to insufficient air intake, the car may experience weak acceleration, slow speed increase, and jerking. Problems with the ignition system: If spark plugs misfire, leak, or fail to atomize properly, it can also affect engine acceleration. Fuel pump failure: A clogged fuel filter can reduce engine power. Prolonged insufficient oil levels may cause mild symptoms like reduced power and increased fuel consumption, or severe mechanical damage such as piston collisions affecting related components.