Vehicle: 2000 Blazer v6 4.3L
- Brake goes to the floor before braking. You have to push hard to stop. Easy to "skid" tires.
- Brake light is on.
- The day before they worked perfectly fine, and the next morning they went to the floor.
- If the engine isn't started the brakes seem fine, but after starting the engine they go to the floor.
- The whole brake system was replaced about a year ago.
- Since then the Spark plugs, Spark plug wires, Vacuum lines, and Cap & Rotor have been replaced.
- *Changed the master cylinder today. No change, brakes still go to the floor, they still work, but they start working in the last 10% or so of pressing the pedal.
Attempts & Checks so far:
- Double-checked the Vacuum lines thinking it might be the Booster, however the booster would make the brakes harder to push not softer and there weren't any issues with the lines.
- Checked for leaks: Haven't seen any.
- Bled the brakes: Didn't change anything.
- The front brake pads are worn a bit but not shot by any means and the rear brake pads are near perfect condition.
Concerns: I keep reading online that it could be a master-cylinder failure when I google these symptoms, however if I google the symptoms of a master-cylinder failure they appear slightly different as I can break, it just goes to the floor before doing it and it's consistently like this instead of being a one-time thing.
Could it be the Anti-Lock Break System (ABS)? I know the ABS has its own light on the dashboard (which isn't on) but is it possible that it's causing the issue with the breaks?
Does anyone know what could be the cause of this?
EDIT: Changed master-cylinder, no change. Any Ideas?