yes i bench bled the master and the whole brake system, the first master i bought from o rielly's did that i returned it and got one from autozone and it doesnt leak. yeah after i replaced the master and bled the brakes the pedal got nice like how it was supposed to be i turned the car on and it depressed slightly like its supposed to do except the pedal slways stays down now. i rev the engine and you can see the pedal move up and get all its vaccum but still making the hissing noise and acting really weird. is there anything special i have to do to replace the booster?