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Old 04-01-2011, 12:47 PM
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Master Cylinder or booster?

I was on my way to the DMV and had to lock up the brake when some jerk pulled in front of me doing 10 mph, I was doing 50. My 73 Olds died on the spot. I had to push it off the road. It finally started after about 10 minutes. Since the hard braking my brake pedal is slowly sinking to the floor at stops. When I hit it hard the brakes work fine. I know the the brake sinking to the floor generally points to a master cylinder problem, but the car dying usually means that the booster is bad from what I remember.

What do you guys think? Did I blow the booster or the master cylinder?

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Old 04-01-2011, 01:10 PM
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The master is bypassing pressure, replace it.
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