[m3flyer]

Originally Posted by johnnybayonne

If you had a vacuum problem with the brakes & brake booster, you would have a stiff pedal or find it difficult to press down on the brake pedal! Squishy brakes sounds like air in the brake system or bad master cylinder!
http://autorepair.about.com/od/troub...s_brakes_2.htm
http://autorepair.about.com/od/troub...s_brakes_4.htm

2nd.

Johnny is correct.

Although loss of the booster entirely may result in weak pedal as well.

Also... check the master cylnder.

Try a synthetic Dot4/5 fluid and flush 'til the bubbles disappear.