So I just replaced all the rotors and pads on my car because I had some warped rotors. Now when I'm braking the brake pedal pumps up and down while i'm applying a constant pressure with my foot. The pedal acually moves my foot up and down while braking. Called around and Brake Depot said they think it might be a bad rotor. I already topped off the brake fluid. Any ideas on what this might be? Thanks in advance

 

you have a warped rotor. it is actually somewhat common for rotors to be warped out of the box. take the rotors in and have the turned. Be sure to clean off all of the surfaces where the rotors sit, clean out rust, road debris, etc. torque your wheels in the appropriate pattern at the right torque. After that, youll be fine.

 

You were right, had all the rotors redone. Sucks that new rotors are warped right outta the box. Thanks for the help.

 

Probably just not bedded correctly.

http://www.stoptech.com/whitepapers/...otors_myth.htm

 

doubtful.........pad bedding has NOTHING to to with pedal pulsing.
And I don't think turning brand new rotors is a wise move, you've just cut the service life of your rotor at least in half to begin with, and it doesn't address the fact that there may well have been a problem in the casting process that produced a warped rotor to begin with. If you are sure the problem is a warped rotor (a dial indicator will confirm this) then I would insist on it being replaced.