I would like to know what exactly needs to go to the last vacuum port on the intake manifold. I put a VTEC top end onto a 95 civic DX which had 3 vacuum lines connected to the intake but the VTEC intake manifold has 4. the DX had 2 smaller and 1 larger and the VTEC has 2 smaller and 2 larger ports.

Now I know the Purge Solenoid goes onto the smaller one on the firewall side down low, and the Fuel Pressure Reg. to the smaller on on front side. Also I know the PCV valve is connected to one of the 2 larger ones but not sure if its the higher or lower of the 2. And finally what is connected to the last larger port? Only thing I can think of but not sure is since I put a larger throttle body on the intake (63mm) I noticed that now next to the MAP sensor there is not longer a vacuum port like the stock one had. Is this missing or is that vacuum line now need to be connected to the remaining larger vacuum port on the intake? Please if anyone can help I would greatly appreciate it.

Thanks,

BS Racing

is this y8 head you put on? only vacuum ports i can think of is brake booster and cruise control.