ok this is one of the strangest problems ive ever had or seen, i have a jdm b16 in a 1992 cx hatch, and when warming up the idle goes up and down as if the iacv is bad, but, when warm, it stops? any ideas? this doesnt make any sence to me. I bought this mani off a friend and it did the same thing to him and the owner before him, anyone have any ideas? tried all the normal ways to check for vaccum leaks and turned up nothing, im pulling the mani tomarrow to helicoil a few threads that the previous owned OWNED, so im going to try to check the mani out a little more then, any help would be awesome...

 

fitv sucks, bypassed it