I have recently had a promblem with my 95 firebird 3.4l v6. I thought that it was the plugs and wires so i changed them and found out that wasnt it. The wont stay running and when it dies it smells like gas. I left the belt off of it and it stays running but rough. the car also sounds like it is sucking alot of air. i was told it may be a vacuum line. Could anyone help me with this matter. Thank you!