I am having what I think is a problem with my brakes on my 99 cobra. Sometimes, when I hit the brakes, it sounds like a wood pecker and the pedal has a pulsing, almost like when anti-lock brakes are active. It is not the anti-lock brakes being active, that is to say that I am not having to be on the pedal hard for this to happen. It is sporatic, not ocurring at any specific pedal effort level or speed that I can tell. Has anyone experienced this as well?? any help would be great, as I am a little new to the "hydra-boost" brake systems, not sure how to diagnose the problem.....