OK , I took the car to the dealer and we were able to reproduce the surge -cut off- lurching issue . Basically it happens with the power button on , and ThunderMosse and the rest of you guys were correct . I have not been " fully loading " the throttle appropiately . It is very sensitive when the Power switch is on . I learned now how to do it and it is a BLAST .
I am grateful to the members of this forum for the advise