Hey i have a 98 civic ex and i replaced the motor with another D16y8 but on my old motor it did not have this vacuum like thing on my IM. I do not know where it goes or hooks up to. For now i jes put a screw inside a hose so that nothin gets inside. So please help me out i would like to know wat to do with it. In the circle is where im talkin bout. This is the only pic i have it so let me know if you guys need more.

 

thats you VTECH sylenoid sensor housing unit for you HID ballast removers.

 

Your new Y8 must be from a 99-00 Civic, which has the FIA control system:

 

thank you for the diagram its very good. I will look at the car tomorrow. and thenk you for taking the time out and looking for me.