ok, so I bought a 93 lude that I believe was originally not si or vtech. the guy put in a jdm h22a and did not complete the swap. there are a whole bunch of disconnected wires including the vtech. I bought a wiring harness for the h22a and plan on hooking it up. Do I need to do something with an obd1 thingy or modify anything? im kind of a noob. what will i need to do to the ecu?