When u press brake pedal it goes straight to floor

Asked by Feb 18, 2014 at 12:15 PM about the 1997 Pontiac Grand Prix 4 Dr SE Sedan

Question type: Maintenance & Repair

3 Answers

90,655

Massive brake fluid leak, totally failed brake master cylinder, could be an ABS problem but never heard of it causing the pedal to go to the floor, I'm leaning toward a failed master cylinder.

3 out of 3 people think this is helpful.
4,525

Check brake fluid reservoir. If it's full then the master cylinder internal seals are shot, and it needs replacing. If one or both cylinder tanks are empty, fill it, and look for a major leak as someone is pumping the pedal. Check the lines, calipers, connectors at all four wheels. The master cylinder can also leak so check that area also.

2 out of 2 people think this is helpful.
3,015

Once you figure out where it's leaking, replace that seal or hose, refill the brake fluid reservoir, and make sure to bleed the brakes from each caliper, starting with the rear ones, then do the front. Make sure there's no air left in the system.

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