Help! I am trying to sort my way through the maze of brittle vacuum hoses to replace the bad ones.

I had to replace the 4 port VRV valve and found the green vacuum line running from it was disconnected. I hooked it back up, but could not get it to hold a vacuum. According to the diagram under the hood, this line runs to the EGR valve - so my EGR was effectively not working.

Tracing the hose, it goes to some valve, then splits to 2 ports on the EGR valve. My question is what the hecl is this valve and should I be holding a vacuum?

Thank you for the help,

Nick



Sorry for the crappy pic, but it is the green line from the VRV to the EGR.



What in the world is this thing with the reddish orange hose running to the base of the EGR and the black hose behind it (attaches to the top) that runs to the top of the EGR?