Just finished the bhg repair. Timing is good. no visible vacum leaks. egr system was removed and all blocked up. all plug wires are firing. It drives pretty decent except for a little shaking and just sounds horrible. It's super loud and sounds exactly like one of those annoying harleys. The exhaust has that tapping rumble and very shaky. NOt the smooth flow I used to have. Can anyone help me out to see what the problem might be? NO codes either. thanks