I know for a fact our cars rotors are prone to warping, and that this causes massive vibration. My problem now is that even after machining, I am getting insane vibration. The weird part is , 1 out of 10 times I brake and get not vibration at all. I was thinking maybe the caliper mounting bolts could be loose. Could a badly installed brake spring cause this also? I am really baffled by the intermittent caracter of the problem...

Marco Tatta
98.5 SE MTX, Duratec
EGR block, fog light
fix, custom shift boot, monsterflow intake, Ecotek valve
Quasi dual cardoctor exhaust.
Hacksaw short shift, Momo race "s" carbon knob, ghetto rear strut bar, 16 inch cougar wheels with 225/50/16 kumho 712s