2000 civic intake switch

hey all i am looking for a name to a switch for a 2000 ex. the switch has two vacuum lines going to it one on the top and one into the side and screws into the intake manifold on the left side as youre looking to the rear of the car. the screw end is brass and looks like it is used for something in the cooling or emission system. or does anyone know where i can go online to get a good schematic of the engine comp? switches hoses etc?... any help would be appreciated. thanks

its an emission purge solenoid