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!

 

umm when my civic's wheel bearing got damaged errytime i started driving it made a knocking sound with a loud thud sound first then it would knock i got a new bearing in n it stopped im not a car pro but dat could be a possible problem

 

I'm gonna check into that, just kinda weird how it happens when I'm not pressing the brakes, someone said brake indicators might be it.