I agree with Holland... that sounds exactly like a master cylinder
failure. Once the internal seals start leaking you don't get the
hydraulic pressure you need. And if you get on the brakes hard with
leaky internal seals, you're at risk of completely blowing out the
weak seal. When the pedal goes to the floor do you notice decreased
braking performance? With the car running (but stopped), can you get
the pedal to sink? If so, I'd put my money on M/C failure and
strongly advise you to replace it ASAP. Late last year I was
experiencing problems similar to what you describe, then one day I
felt a "pop" while applying the brakes and the pedal went to the
floor (and didn't come back up). Heart attacks aren't any fun at
this age (or any age, i s'pose)...
- Nathan
BTW - for the part, Mark at Adirondack or Mike at VirtualWorld will
help you out. You'll have to bleed the entire system, but the job
really isn't bad.
At 6:15 PM -0800 1/25/00, Holland J. Phillips wrote:
> Slowing to a stop from a decent speed (>45mph), gently
> applying the brakes, the pedal slowly sinks towards the floor.
Master cylinder is toast, or possibly a leaky caliper. Inspect around the
master, and all four calipers and see if anything looks damp with brake
fluid.
My money's on the master cylinder, which probably won't leak fluid
externally. You could try bleeding the brakes also, but don't expect any
miracles. I'm still betting on the m/c...
--Holland
Forced Failure Racing
Don't Ask MotorSports
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San Jose, California
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