Originally Posted by Dylansdad
Where exactly is this vacuum reservoir located? I have looked to the left of the master cylinder and I do not see what you all are describing............is it different on a 96 model??
I have the standard a/c controls, but I have had a problem with the air switching to the defrost under acceleration for a long time now............
The vacuum reservoir is usually over on the passenger'* side, mounted on the firewall or the evaporator core housing, somewhere in the area of the right (passenger'* side) hood hinge. Its location varies from one model to another. It'* a sperical, black plastic thing maybe 4" or 5" in diameter.
If air switches to the defrost under acceleration, you're losing intake manifold vacuum. The reservoir is supposed to compensate for that short-term, but if yours keeps running out, look for a vacuum leak somewhere, or excess backpressure from a partially clogged catalytic convertor. (If your top-end speed is down, or the transmission hunts in and out of lockup at highway speeds, check the convertor.)