having problems with heater/ac. air only coming out at demister,does any body have a diagram of vacunm set up. i`am getting suction on black air line. need help.

hey, check the vacuum lines in the engine bay, my EB done this when i bought it and it was a pipe that slipped off the back of the manifold on the tree.

my NC is doing the same but its a lil harder to work out as its got the EL ticky motor with BBM setup... but yeah it worked on my EB perfectly