I just put the D15B vtec into my civic and it is idling at 3K and starts a little reluctantly. I have tried everything I can think of but have little knowledge on these swaps. I have looked around through the forum and haven't really noticed anything specific on this swap. If anyone has any thoughts or suggestions on what I can check or do that would be great. The OBD reads out one flash which indicates the O2 sensors, although it could just be something simple as a vaccum line causing a bad fuel air mixture. I used my stock DX wiring harness and almost everything hooked up like butter. the only real problems that I have is that the D15 motor has an EGR and I dont see anything equivelent to the IAC (Idle Air Control) valve which I hooked up off my manifold from the D16 and ran the hoses into it and plugged it in. I have unplugged it to make sure that wasnt the problem but it had no effect. I pinned the Vtec into the computer and also pinned the knock sensor. Would appreciate any help, thanks. If anyone wants to take a look at it, I am in Portsmouth. PM for contact info