Put it back the way it was.
I had the same problem with my first setup. The only thing that you can do is figure out what the heck is making that racket and change it. Either take it back to the muffler shop or crawl under the beast yourself. Then fix the problem.
I had the same problem with my first setup. The only thing that you can do is figure out what the heck is making that racket and change it. Either take it back to the muffler shop or crawl under the beast yourself. Then fix the problem.