Need a brake expert!!!

[tdr1919]

My original problem seemed to be the power booster, after about 500 miles on new pads & rotors, my pedal got hard and it was difficult to stop the car.
there was also this loud woosh sound of vacuum leaking from the power booster, after removing the the booster I noticed brake fluid weeping from the M/C, so I changed both with "remanufactured" booster & M/C. I bled the
m/c and the system, all new dot 3. I jacked the car and rotated each tire testing for caliper lock and made sure when brake applied each wheel would
stop (engine off). when I start the engine the pedal will drop far enough to
turn on the brake lites, when I goose the engine the pedal rises and the light
goes off. BUT when I apply the brake pedal It will go down and rise slowly sometimes not all the way up (brake lights stay on). Engine vacuum at idle
is a steady 18". An ex-mechanic stated when I described the problem he said it has been his experience that remanufactured boosters are about 50% good, and that this one is probably bad. HELP!
Tom

[gmjunkie]

I'd say that the air is not all out of the system!! junk!!

[Achilles]

Originally Posted by gmjunkie

I'd say that the air is not all out of the system!! junk!!

Thats what it sounds like to me. Start bleeding the lines starting at the wheel furthest from the M/C and work towards it.

[gmjunkie]

Originally Posted by Chickenjerk

Thats what it sounds like to me. Start bleeding the lines starting at the wheel furthest from the M/C and work towards it.

And jack the Rear of the Car as Far Up as Possible!!

[HD2HVETTE]

A vacuum bleeder would be nice. With ABS it can be very difficult to purge the air.

[tdr1919]

Guys Thanks for all your help - I pulled the M/C and started the car, i noticed
the booster extended all the way out as if some one had their foot on the brake, I temporarily connected the old booster and it remained at a neutral position, when i pushed the brake side it extended (but I could hear the vacuum leak) I returned the new booster and got a replacement. Before I installed it I tested it with the vacuum connected, it stayed in a neutral position, when I pushed the brake side it extended as it should. Put everything back together and it works fine!
Thanks,
Tom