Quote Originally Posted by HotSauce View Post
This is another good guess as well. What year is the A4? I still think pulling codes on this thing is by far the easiest way out.

Also, is the CEL on? If so, is it solid or flashing?
my guess is that its flashing, also I have seen this happen to this same car, that it will throw a misfire codes and come to find out someone installed the timing belt gear on backwards causing it to be off time there for going into limp mode... talking about a mad customer after they paid a show 800 bucks, but now they have to pay me as I am not that shop...But I only charged them 200 bucks the whole front end has to come off