> I'm pretty sure this isn't normal.  But I noticed today when I am at a
>  stop and I have my foot resting on the brake pedal it slowly fades till
>  the pedal hits the floor.  Is this caused by air in the lines?

I've never had air in my brake lines, so I don't know what that feels
like--- mushy, I'd expect--- but my brakes have done just what you
describe when my master cylinder has needed replacing. Brakes work
fine, but under constant pressure fluid leaks past the piston seals
and the pedal slowly sinks to the floor? Seen it in three different
cars. All master cylinder.

--
John Bange
'90 Vanagon - "Geldsauger"
'90 Vanagon GL - "Wiesel"