2001 Saturn SC2 jerks after Tune -Up

Problem solved (so far), I picked up the car today, paid 200 in parts at the shop owners cost for coils/module/wires. Car drives great, no jerking hesitation or any whiplash inducing action. Power is the best since I've owned the car. Even when I shift I am not getting any kind of weird response, any jerking or hesitation. I can't believe that it drives fine, I was waiting for it to break down and leave me stranded on the way home but it drove better than ever. Learned many lessons from this experience especially about the ignition system, thanks to the board members for all your input. Hopefully my trusty Saturn will stay healthy and live long.