Hi im new here i have a 2010 mazdaspeed 3 with cobb intake, test pipe, ultimate exhaust, stock bov and fuel pump internals. for some reason im getting a strange bov sound. It sounds almost like a horse lol. i have no idea what it is or if its bad for the car. its like a rolling sound. any idea would be great thank u. http://youtu.be/sLPdu7NlVQM