Can't get brakes working after repair - 92 S4

[Dan Smisko]

Thanks to all for your suggestions.  It turns out that pump-and-bleed
worked.  Even though the fluid was coming out clean with the pressure
bleeder, I got more dirty fluid and a lot of air out the right rear.
A little dirt and no air out of the left rear.  Fronts were fine.
I wonder what's going on?

I'm not done yet, though.  My bomb is still sick.

Dan

Previously I wrote:
 > Now I can't get the brakes bled, or so it seems.  The pedal goes
 > to the floor with little resistance.  When this happens, the brake
 > light comes on for a second, then goes off.  I'm using a pressure
 > bleeder, and did jam the stick in the spring on the equalizing
 > valve, or whatever it's called.  So far a couple of liters of fluid
 > have gone through with no improvement.  It's coming out pretty
 > clean, though.