if you still have a boost leak, that's only going to do a little good. try it and see if that fixes the lurching problem. if not, you need to find the leak.

 

I can hear my turbo making some rattling sound so i think the turbo going bad do you know where i can buy a turbo how much am I looking at for a new one or used one and what type of turbo do I need to get that would just bolt right up to my old one car is all stock