I attempted this procedure this morning, but I stopped when I saw this hose from my Throttle body to the top of the valves (I think). It looks brittle and I want to find a replacement before I attempt to remove it. Can anyone tell me what this is, whats in it (I assume air), and maybe the Inner/Outer diameter of the hose?
All the pics and guides I've found for this process don't mention this hose. In the pictures the line is capped off on the throttle body.