The car is jerking

Jerk at the moment of the beginning of the movement

Jerks during acceleration

Jerks in steady motion

With regard to a car, a jerk is a short-term spontaneous change in the engine speed, regardless of the position of the accelerator pedal. In daily operation, as a rule, there are a series of jerks. The limiting case of a jerk is failure - a noticeable delay in the engine's response to pressing the accelerator pedal.

Conventionally, three types of jerks can be distinguished:

- at the moment of the beginning of the movement;

- during acceleration;

- with steady motion, i.e. at a constant position of the accelerator pedal.

To determine the causes of jerks when driving a car with an injection engine, special diagnostic equipment is required, so we recommend contacting a service that specializes in repairing fuel injection systems. However, as practice shows, in most cases, jerks are caused by insufficient fuel pressure in the fuel rail or a malfunction of the throttle position sensor built into the throttle assembly cover. In addition, a specific cause of jerks in a Ford Focus equipped with an electronic throttle control system may be a malfunction of the accelerator pedal.

With some skills, the cause of jerks can be identified independently.