- posted
18 years ago
88 S-10 Blazer 4x4 4.3 A/T Power Brakes.My brake pedal seem to be slowly creeping to the floor while sitting in traffic.I know this can be a sign of master cyl.going bad,but also the porportioning valve was leaking a little.So I replaced both M/C& P/V.I also bench bled the mc before installing.Bled the brakes got a full pedal,started the eng. pedal goes almost to the floor.The emergency brake light is working,because it comes on when I bleed the lines on pedal pressure.The back part of the mc bubbles up when pressure to pedal is applied.So I installed another mc and the same thing.I think I know what it might be.I'm hopeing anyway,but before I say ,I would like to get some of your opinions?Thanks! Bobby