My daughter's 1995 Legacy 2.2L auto AWD is having the issue described in another thread, about a stiff brake pedal when extremely cold and normal operation after the car warms up a minute. So I'm guessing the check valve in the vacuum line to the brake booster is freezing shut and needs a good shot of cleaner and / or WD40. Problem is that she is in Colorado and I'm in West Virginia... so she's gonna have to try this fix on her own. I'm sure he's quite capable of the fix, but I could use some pictures and specific instructions for her so she can easily find and remove the line and spray in the WD40.
Any help would be appreciated!