Guys, I didn't see anything wrong with the vacuum reservoir (above the evap housing in the engine compartment) or the lines I could find. I held the vac tank with the fitting down in the swimming pool for several minutes- if it had a leak I should see bubbles as air came out and water came in - no sign of a leak and no cracks evident. I later put a short piece of hose on it, sucked it out by lung power and clamped off the hose. About 10 seconds later I loosened the clamp and heard air rush back in. The tank is okay.
I also loosened the A/C control panel on the dash with the switch that controls all of this - Vent, Norm A/C, Max A/C, Floor, etc. It has many vacuum hoses, but I did not see any obvious crack or bad hoses.
The line from the vac tank enters the heater/blower box under the hood- I tried to remove the blower motor and fan to see inside - wher it went- but couldn't get it out with the A/C accumulator in the way. On the inside, I removed most of the dash and instrument panels, looking for more vacuum motors. I found one under the right-side top panel (sort of above and forward of the glove box) that seems to be involved with air distribution under the dash. I removed it and I could suck on the fitting and actuate it. If I manually push it to the actuated position and block the vacuum fitting, it does not leak and return- I think it's okay.
Is there another vacuum motor under the dash,
somewhere else, that is causing this change in the airflow output? Joel
Sunday, October 19th, 2008 AT 7:13 PM