[kommon_sense]

its for my mom's mazda 626 (which is the shittyest car in the world). Well when I press on the brakes the pedal pulsates back and forth and it does it until the car stops. After this thing started I changded pads and flushed the system now the only thing I think might do it is the disks but I dont know if I am right. So if you know whats wrong with this junky car please tell.

you sure it isn't the ABS? If not abs, then yank the rotors and have them turned. Should be about $10 each if you pull the rotors yourself.

 

[kommon_sense]

what you describe is exactly what it feels like when abs kicks in...