Brake pedal goes half-way to the floor, only the first time.



Finally driving my car again after it was laid up for 2 months.

I don't think it was like this 3 months ago.

When I first press the brake pedal, it goes half-way, but certainly not
all the way, to the floor, and at t hat point it stops the car very
well. If I press the pedal again within 2 or 3 minutes, it moves very
little before it's stopping the car.

If I wait maybe 15?? minutes, it's like the first sentence in the
previous paragraph.

What's the problem?

Bad master cylinder?