I have been encountering exhaust "popping" in my A4Q when decelerating in first or second gear from between 3000 to 6000 rpms with little or no throttle. If I had a pikemup truck, I would be "racking" the pipes. Is this situation normal, harmful??? I never encountered this in my 4kCSQ. Thanks, Eric Schumacher es61@prism.gatech.edu