Soft brake can be caused by the following:
Bad master cylinder
Brake light switches air bound. Yes, some timed they do not fill. I pour
some fluid into the switches before installing them. I learned this the
hard way.
Bad rear brake set up-adjustment. Easy test, try with the hand brake on.
If the pedal becomes firm then the rear brakes are the problem.
Really bad bulging brake hoses.
Wobbling or badly warped from rotors.
Bad rear brake pressure regulator. Yes, they do go bad.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Roger VanTill
Sent: Sunday, July 27, 2008 7:20 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Soggy brake pedal

I've been dealing with this problem for a while too. I replaced
everything in the system but the booster this spring and the pedal
still doesn't feel like my 86. Too much travel, too squishy. Could the
flex hoses cause this?