I am pretty sure the MC needs to be replaced, but just thought to run this past you guys.
driving in stop and go traffic, normal pedal, then gradually the pedal would go further and further before pressure would build up. then the pedal went all the way to the floor, but did engage what felt like the right rear caliper. I tried pumping the pedal, no go, then I hit the pedal quickly and released, this seemed to free up everything, and the pedal started working normally. I plan to pull the caliper and swap it for one off my parts car 78D (any problmes with this swap?) at that time, I will drain all brake lines and flush with Dot 3 then fill with dot 4 synthetic. I will look over all the flex lines and replace them as well... just wanted to know if any of you agree it has to be the master cyllinder.
John

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!