ok heres the deal. I bought a civic dx with a d15b engine swap. The only problem is it idles really high, probably about 1700 rpms for a couple of minutes, then it pulsates up and down till it warms up then its fine. Anybody have any suggestions? Also there is a round gray connector toward the back of the engine that is not hooked up, looks like the one that goes to the IACV and stuff. Any idea on where it might go? Looked everywhere but can't find any sensors that don't have any connectors on them. Any help would be great. Thanks