ok my friends 90 rex wut a 1st gen b16 wouldnt stop fluctuating and idling high...when the engine is cold and started it, it will rise slowly to 2500, then as soon as it gets to 2500 it will start fluctuating...ive checked the vacuum lines and couldnt find any leaks, took apart the FIT and cleaned no change, took apart the IAC and cleaned that for at least 20 min and no change..i cant figure it out...im thinking it might be a vacuum not plugged in or not in the right place...anyone have a vac digram of a 1st gen b16 IM? any help on this would be appreciated