Well I changed out the Y pipe today becuase the old one was crushed. I had some issues with the fitment but finally got it all bolted up... I had to do some welding to fit it to the cat-back and what not. I unplugged the battery and the computer before I started welding. I went to start the car and it started right up.. I went to mess with the throttle body and pull on it a little and it stuttered.
Now I haven't drove it yet because of the stuttering problem, I know a new Y pipe isn't going to mess up how the car idles or runs. What is going on with my car, it will lag if you try to open it up a little bit and as soon as you close it, it will rev up...? Somone please help me!!!!!