What causes jerking between 1500 to 2000 RPM in a car?

[VonJoel]

It may be due to excessive carbon deposits or oil sludge clogging the throttle body. Below is some information about engine jerking: Throttle Body: The throttle body is a controllable valve that regulates air intake into the engine. After entering the intake manifold, the air mixes with gasoline to form a combustible mixture for power generation. Connected between the air filter and engine block, it's often called the "throat" of an automobile engine. Types: There are two main types - traditional cable-operated and electronic throttle bodies. Conventional throttle mechanisms use either a cable (flexible steel wire) or linkage rod, connecting the accelerator pedal to the throttle linkage plate. Electronic throttle systems primarily rely on throttle position sensors to adjust the throttle opening angle based on engine demand, thereby regulating air intake volume.