Hey guys I'm new I am looking for what to do I put in a JDM version 8 2004 into 2004 USDM wrx sti everything plugged and played minus one plug which I assume is for drive by wire the car runs in limp mode. I have JDm ECu and AVCS harness but how do I get the JDM ECu to connect and handle the drive by wire part? I assume I can split out the drive by wire part of harness and add it and throttle body to JDM motor~! Then how do I connect JDM ECU or can I just add a Cobb 2.0 AP to USDM AND that will take care of it!