Join Date: Dec 1999
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Re: off-again brake booster
sounds like the master needs to be bench bled.
you have to bleed them befroe installing or youll never get the air out of it.
use some plastic fittings ( autozone or napa) they should come with the master cyulinder, they are usually red and blue, and some short clear plastic hose, screw the plastic fittings into teh ports on teh master cylinder, slide the hoses over the nipples, and then some kits come with clips to hold the other ends of the hoses inside teh resivioir of the master cyl, and you use a screwdriveer or other rod to push the master cylinder's plunger a bunch to get the air out, its hard with out having th ecylinder in a vise or clamped down somehow, or you can do it on the car if you can get the cars brake lines away without deforming them and then uuse the brake pedal to cycle it.