BS:
Thinking out loud here. You say that if you let the brakes sit for a few
seconds and step on the pedal, it goes to the floor. Okay, so let's assume
that the MC is fine. The next time you step on the brake, then fluid is
going SOMEWHERE. And if you step on the brake again and it's firm, then the
void that the fluid went into is now full. If there's no fluid leaking,
then the system either has air somewhere, or something is expanding the
volume of the system. Could it be that one or more of the pistons in the
calipers is somehow retracting? With the pedal relaxed, that could slowly
push fluid back past the piston in the master cylinder and into the
reservoir. Then, the next time you push on the brake, it has to move that
piston before it makes contact with the rotor.
Rich Wagner
Montrose, CO, USA
'82 GTV6
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