So I've been having rough idling/running issues with my 2001 Jetta 12V VR6. The OBDII scanner is throwing an error on both o2 sensors(just purchased going to install this weekend), camshaft sensor, and cranshaft sensor. This is all accompanied by a horrible fume/gas smell. Tonight I am under the hood looking around and notice that a hose coming from the right side of the engine running down underneath the airbox is unhooked. I am in the process of removing the intake to get a better look. Does anyone know what this hose is and where it needs to be attached? Thanks in advance!