I have a lot of water coming out of the drain hose from furnace, and its black! I took a shop vac to it cleaned it out good. Now it shuts down, blinks a code "pressure switch vent blockage".. I clean it out still getting the same thing and now Im smelling something.

I replied to you about 30 minutes ago but my answer hasn't shown up.

Get your furnaced checked by a qualified technician. There can be no question about proper vent operation for a propane furnace. It could be very dangerous for you and your family.