Well when I got my Civic it had a homemade intake on it and I have that same problem; an open black hose.
Like THEDARKONE said, shouldn't the yellow hose on the valve cover be plugged into the intake....
No it shouldn't look like that. Leaving that tiny bit open will suck in contaminants. Like the others said, the breather hose for the valve cover should be attached to the intake tube.
No it shouldn't look like that. Leaving that tiny bit open will suck in contaminants. Like the others said, the breather hose for the valve cover should be attached to the intake tube.