Jason- I'm no expert, but it sounds like a vacuum leak at the very least. My prime suspect would be the power brake booster and the vacuum lines connecting to it. Rick "Jason Slaten" <jasonslaten@xxxxxxxxxxx> 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. > > >