wigia, you don't have a bad booster you have a bad master cylinder, and one of these days it ain't gonna pump up and you are going to hit something or someone.

Either rebuild it or replace it PRONTO!!!!!

Pedal that goes the floor but firms up with a pump or two is almost always a master cylinder leaking -- it will also sometimes drop to the floor slowly under light pressre, but stay up under firm foot pressure. Fix it before you have a wreck!

It works at the bottom of the travel because either only one seal is bad and you have to use up all the spring travel on the piston, or the bore is shot and they only work when you get to the good part at the bottom.

Judge:

Check for a break in the main vac line. Usually it's the plastic part with all the vac lines attached -- if there is a large crack there, or one of the nipples is broken off, all the va leaks off faster than the pump can make it. New line is only available complete (from booster to vac pump), about $35 on FastLane.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!