Ok, my engines doing GREAT.. but there's something else up that started today.. whenever I'm driving, theres this 'thud' sound UNLESS I press the brakes then, it get's silent and I don't hear anything, nothing, so obviously it's a brake problem, but what would cause it? I'm gonna pull it apart tomorrow, doesn't mean I'm gonna find out what's up so if you all wanna shoot some ideas, would be great!