My 02 Montero has a pulsing brake pedal that reminds me of what many people call warped rotors or runout is out of spec. Just did the brakes all the way around within about 6 months and they were smooth initially. Have not driven it very much as I was waiting for cooler weather to fix them. When I rotated the rotors on front passenger side it appeared to be rubbing on the caliper bracket but did not see much witness marks probably just from me spinning them. Taking rotors to see if runout is high. Any thoughts if rotors check out fine what to look for next?