B4 ABK no full gas possible

Hello dear Audi community! I have the following problem with my Audi 80 2.0E with the ABB engine: When I step through the accelerator to accelerate it suddenly, the engine swallows before it accelerates! If I hold the accelerator pedal fully pressed then it already has its full power, but starts to jerk slightly when riding uphill in the upper speed range! If I step through the accelerator slowly then it does NOT swallow but catches at higher speeds n also at easy to jerk! Otherwise he drives himself but normal, no jerking if you hold the speed or anything else and start problems he does not, it is only when you suddenly give full throttle! Have already controlled ignition cables and all the hoses in the engine compartment but could not find anything extraordinary! Does anyone have any idea what else I could do?? Have already used the Sufu but found nothing that fits my problem! I am very grateful to you for your Hil Mfg, Gizmo74