with there ultra intake they have you hook it up from the plenum to one side of the icav and vent back to the atmosphere out the other side. this is just a huge vaccume leak/boost leak. correct? if i was to re rout it back the plenum (the side to atmosphere) it would just defeat the purpose of the icav right?? im also using there 70mm pro series throttle body. why i ask it hard to get the thing to idle right. im using neptune and i have my iacv duty cycle turn up to 90 which is high as heck. car idles at a grand but biggesit thing is the huge vacume leak

 

I understand English isn't your first language, but it would help if you could speak more fluently. If you ever took the time to look at how ALL of the IACV's are plumbed on a stock Honda, you would find they allow metered air to come in from in front of the throttle plate. This could be considered atmospheric air in most cases. The source of your problem is either you have a mechanical issue or your tune just plain sucks.