I have a vacuum problem with the AC in that there is air coming out the defroster vent at same time as dash vents in the normal AC mode going up hill ( decreased vacuum ) it gets worse. There is a yellow vacuum check valve on the wall that is in front of the fuse box but slightly toward the middle. It has one input and 2 outputs. Great vacuum coming in. Have not checked the out vacuum as the lines seem to be fused to the plastic valve. What is the chance that this valve could be defective as opposed to a bad vacuum motor. If you disconnect the vacuum line then the air all goes to the defroster vents and side dash vents (default position I guess) Thanks Barry
- posted
19 years ago