I would check and see if you have a transmission or PCM problem.
Check TORQUE CONVERTER
when u jerk it and u start
Idle speed too high.
Yes, because a jerk is a jerk, they would be likely to like another jerk!
What kind of car is is? When it jerk while shutting off, do you turn the key off and it sits there chugging for a second before stopping?
No. I look at you and start to die you jerk
Have your cat converter checked out.
It is most likely your HT leads or coil pack.
car will jerk forward and then go in reverse
a small evap leak would not cause your car to jerk.