It sounds like either the booster is leaking, or the vacuum hose going to it. Just changing the pads shouldn't require bleeding the the brakes. You should of course adjust the shoes. John Jason Slaten wrote: > '71 IMPERIAL LEBARON 4DR HRD TOP...440..2 BARRELL HOLLEY.. > > I NEED HELP..I HAVE NO STOPPING POWER..ALL I HEAR IS A "PISS"-TYPE OF > SOUND...LIKE A AIR ESCAPING OR A SNAKE HISSING...I HAD BOTH FRONT AND REAR > BRAKES CHANGED...ITS LIKE A PILLOW UNDER-NEATH MY PEDDLE...IT JUST HISSES > AND THEN STOPS....DO U THINK I NEED MY BRAKES BLED...IS THAT CUSTOMARY WHEN > BACK PADS ARE CHANGED...DO U THINK I NEED ANOTHER BRAKE-BOOSTER > > _________________________________________________________________ > Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. >