Possible reasons:
* Worn or dirty spark plugs: Poor ignition can cause the engine to run rough and jerk.
* Dirty Throttle Valve: A dirty throttle valve can impede smooth air flow, resulting in a hesitant idle and a jerky brake release.
*Throttle Position Sensor Problems: A faulty throttle position sensor can send inaccurate signals to the ECU (Electronic Control Unit), causing the engine to not operate properly.
* Automatic transmission problems: A faulty torque converter or other automatic transmission components can cause jerking when shifting gears.
* Automatic transmission oil level is low or in poor condition: Insufficient level or poor condition of automatic transmission oil can lead to malfunctions and jerking.
* Weak or faulty ignition coil: A faulty ignition coil can cause misfire, which causes the engine to run rough and jerk.
* Vacuum hose problems: Damaged or loose vacuum hoses can cause leaks, which will affect engine performance and cause jerking.
*Faulty Fuel Pressure Regulator: A faulty fuel pressure regulator can result in over- or under-fueling, causing the engine to run rough and jerk.
Diagnosis and elimination:
* Check and replace spark plugs if necessary.
* Clean the throttle valve.
* Check the throttle position sensor.
* Diagnose the automatic transmission for faults.
* Check the level and condition of the automatic transmission oil and replace it if necessary.
* Check the ignition coils for faults.
* Check vacuum hoses for leaks or damage.
* Check the fuel pressure regulator.