Then step on the pedal and hold steady hard pressure on it and see if it creeps.
Repeat with LIGHT steady pressure.
If it has no external leaks, and it holds with hard pressure but creeps with light pressure, the m/c is bypassing internally.
Glen
--Previous Message--
: I recently replaced my original brake
: master cylinder with a new unit. I did
: not bench bleed the MC - a number of
: people told me any air should bleed out
: by the normal method with enough
: patience. I was able to get a firm
: pedal after several thorough bleedings
: of the system. Driving the car about 30
: miles I felt like the pedal was
: sometimes a tiny bit soft, but on any
: second tap of the pedal it firmed up.
: The next time I tried to drive the car
: the pedal went straight to the floor. I
: bled the system again, but no luck. If
: I push hard on the pedal it has some
: feel, but usually slowly goes to the
: floor. If I push gently it goes
: straight down. Does this all suggest a
: bad MC? There is no fluid leaking from
: the plunger end of the MC. The car does
: have the PDWA. It was replaced about 15
: years ago. Can the PDWA cause issues
: like this? Or should I go back and
: bench bleed the MC? Any advice would be
: gratefully received.
:
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