When the car is running you're getting the power boost, so it will go down just about to the floor.
Drive it. If it stops and continue to stops harder to when you're pressing the brake as far as it can go, I would say there is no issue. If it is going down and not stopping any harder, and the calipers are not leaking, it's a possible master cylinder.
Originally Posted by kerryann
I am not a lesbian but if I was I would do her.