Exhaust Blowing.. help?

  1. #1
    Basically one of the welds from the exhaust had a crack so i had it rewelded..

    Now at first the car sounded alright but to me on idle the car sounds abit rough and loud... When revving its hard to tell wether or not its blowing as i havnt heard the exhaust system when its not blowing.. Ive been under the car while its been turned on to check to feel if air is blowing and i can't feel anything... When i put my hand over the exhaust you can hear air blowing out of somewere.. Is that meant ot happen? Dont quite understand how when i do that air comes out but when im under the car i can't feel nothing..

    Anyone help would be appericated!
  2. #2
    get a mate to put his hand over the exhaust while you look under it to see where its blowing