Idle jitter after replacement of BMW 7 series injector

The throttle is too dirty. The idling jitter of BMW 7 Series after replacing the throttle valve is because the throttle valve is too dirty and the throttle valve has too much carbon deposit. Too dirty throttle valve will cause the throttle valve to close after a certain mileage. BMW 7 Series is BMW's top luxury car series, with four doors and front and rear drive.