noise

Hi all, First off, glad to see such a great forum/support on G20. I bought a '99 G20 with 90K miles on it in the first week of Feb. My first car :cool:. Since the past week, I've noticed a faint continuous flapping noise in the car. I've located the noise to be coming from the front right ac...

I am betting it is something with my AC line, like a vacuum line? But I don't really know where to start looking. Everything seems to be working just fine with the AC/heat at the moment (both at idle and driving). The noise is coming through the vents (center one, but more so on the passenger...