Idle air valve

I got a 2000 b18b1 and i guess in the swap they didnt use a idle air control valve or something cuz when its cold or just overnight, the car will not idle until i manualy warm it up by giving it a little gas
how do i go about putting one in
does it use any wires like to the ecu?
how do i go about putting one in
does it use any wires like to the ecu?