I just tuned up a 1994 nissan maxima gxe 3.0 litre engine single ohc. I replace plugs, wires, cap and rotor. It idles unsteady. I noticed a cane shaped metal hose on the drivers side of the engine about 6 inches from thefire wall and above the oil filter. One end come out of the engine and the other is bare...Am I missing a vacuum hose there? I cant find one that is disconnected or another open hose line. thanks,
mike
P.S. the milage is 171k