1994 Pontiac Grand Am Brake pedal goes right to the floor

Tiny
THESLIDER1
  • MEMBER
  • 1994 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 145,000 MILES
I've changed the master cylinder and bleed the brakes and the pedal still goes to the floor. The rear wheel cylinders have both been changed. The bake pads and shoes are good. The rear brakes are properly adjusted. If I unscrew all four brake lines on the master cylinder and screw plugs into the master cylinder, the brake pedal is up and hard. It's not leaking brake fluid anywhere. Could it be a caliper or brake hose problem?
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Saturday, October 24th, 2009 AT 3:26 PM

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Tiny
SERVICE WRITER
  • EXPERT
You are on the right track.

IT sounds like a fitting that is allowing air back into the system.

One wheel at a time, pinch off the brake hoses and begin bleeding. When you finally get a pedal, you located the hose, fitting or caliper most likley giving you a headache.

Was this a problem before the wheel cyls? Make sure those connections are tight.
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Saturday, October 24th, 2009 AT 3:36 PM

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