I have a coolant type leak coming from the pipe (behind the heating core) located at the fire wall. This pipe is around passenger area engine bay behind the heating core and next to the wire bundle going inside the car. There is nothing connected to it. The liquid looks like is green (may be radiator fluid or refrigerent of the A/C). By touching the liquid looks kind of oily. Does anybody have open pipe at this place and have problem like this. My car has a smell when it is wet out side. I do not know this smell because something leaking from the heat core or just the common problem everybody has. BTW I try to clean the vents with the spray they sell at the Murray's auto parts. I checked the fluid level in coolant tank and it looks OK. Heater is not blowing hot air either. Can not able to check the A/C since it started to get cold around here in Michigan (I had topped off the A/C few weeks ago). My A/C just work on fan speed 1 and 4. Thanks for the help and hope I can resolve this before winter hits when I need the heater.