Quote Originally Posted by joejenkinsglass View Post
Sounds like a bad exhaust leak to me. I'm going to assume you put oil in the engine.
this is what i would spend some time on to exhaust leaks can sound like a rod know some times. take a mirror and hold it close to all places where there is a joint in the system back as far as you took apart and if it fogs its a leak and needs to be fixed. if not you can take a long scrue driver and hold one end to diffrent parts whit it running and the handle to your ear and see if you here it kocking it may held you pin point it.