Getting hotter (or getting closer to cold)

[David.Ullrich at ferguson.com]

OK, I've checked the vacuum system, it's working properly. The flap opens and closes fine. The seal on the flap is pretty much toast and is leaking warm/hot engine compartment air into the system. So that definitely needs to be replaced. So, is there a special Audi part I need or will any old foam weather seal work? Also, I wonder if my airbox might be missing some parts. On the outer edge of the airbox is a black sticky seal like substance which makes me think there used to be another part attached there. See http://pictureposter.audiworld.com/10100/airbox1.jpg  to see a pic of this.  There is also some sort of little sensor on the side of the airbox. It has an electrical connector that goes into a wiring harness that goes into the cabin. See http://pictureposter.audiworld.com/10100/sensor1.jpg  for a pic. What is this sensor? What does it do? is it supposed to just be out in the open exposed to the engine compartment air like that? Any thoughts? Dave

1987.5 Audi Coupe GT "Special Build" 2.3 - Anthracite Black
1998 VW Passat GLS 1.8T - For Sale CHEAP