I've got a stumper on my hands with a 92 Caprice that does not blow enough air from the vents, floor or defogger grill on dash.
All outlets are equally poor, almost to the point where you can barely feel air at all. Blower motor is going a mile a minute and works on all speeds. Squirrel cage is not slipping on shaft. It seems sealed well enough, although I can feel a little air coming from the long moulded piece on the flange, not enough IMHO to cause any problems and when I press on it to make a perfect seal it doesn't help much.
No vaccuum hoses appear to be disconnected from the control panel nor the clear plenumm they pass through and I don't hear any hissing nor apparent engine problems due to a leak.
My guess is that since it is ALL OUTLETS, on ANY speed and selection (Max air/Normal/Heat etc) it must be the first door in the system that is somehow stuck partially closed or maybe the primary vaccum supply line doesn't have enough suck.
The FSM is terrible at showing how the system works.
So before I destroy my dash and so forth pulling this pig apart, what is the usual fix for this problem? Any ideas will be much appreciated!
tia psycho