z22se jerks , power failure at full gas , help !!!

have from a certain operating temperature strong jerking in 4 and 5 strokes when I completely step through the gas pedal to record drive. as if not enough sprite arrives….curs itself like: drtdrt when the speed is extremely high, it is virtually away at about 140kmh it virbrates extremely and you notice it at the switch knob…. from 150-160 the vibration is almost gone. have already changed ignition plugs and ignition module, no improvement. today I switched off the agr, no change. tomorrow I change the petrol filter and make an oil change, I don’t know any more….it’s just annoying…. maybe you have another idea ??? thank you for your efforts