Hi All can some one please help?  Here's the story as told by the digi-wife:

"First there were brakes and then they were gone... no matter how much you
pumped they wouldn't come back."

Now the facts:

        1.  88 GL (vanilla flavored with manual tranny)
        2.  I investigate the problem, no leaks at the wheels and pedal would fade
when press (engine off, not moving)
        3.  I replace the master cylinder

Now the problem:

        1.  booster makes (pardon the term) a slight "farting" sound when applying
brakes (no smell)
        2.  Brakes work
        3.  Brakes now engage at the bottom of pedal movement as opposed to top of
pedal movement (digi-wife worried but I told her they now work like the
brakes in my 90 GL, still worried)
        4.  master cylinder purchased from dealer (after market type)
        5.  Master cylinder had three prong brake light sensors (pre 86), had to
move old two prong sensors from old unit
        6.  Checked check valve in engine compartment (per master Bentley's
request) and it is OK (massive pain the butt to get off)
        7.  After market master cylinder is German made (Stueck) but marked 251 611
021 C and checks out with EKTA

The question:  What do you think is wrong?  Booster?... cylinder? ... etc?

Thanks in advance.

Jere
90 GL
88 GL