I was having a problem with my brakes due to warped rotors. They worked fine but pulsated like crazy. I changed the pads and rotors and it corrected the problem for the most part but I still get a pulsation when braking hard. Anyone have any ideas why?

BTW, I replaced the front pads/rotors, not the back. I do suppose the back could be causing that as well. The front was so bad it is quite possible the back are warped as well.

 

you can use a gauge to measure rotor thickness. if it changes as you move around the perimeter of the rotor you have warpage. google it for how to.

 

You may be feeling the ABS kicking in to keep the wheels from locking up. It will give you a pulsating feel in the brake pedal if you brake hard enough.
Bob

 

Replace the rear rotors and pads and you will probably eliminate the remaining braking pulsation.