Nissan 240SX Forum : “vac lines on plenum. not under.”

vac lines on plenum. not under.

on the intake plenum.  4 vac ports on the -lenum. with go to crank case. When i Ka T. Is the crank case become bost. I bloacked off all the individual once going to the individual intake. 180 from the fule injecter.

That main line. is it blocked off. vent or part of the vacume system when i kaT.