Ok guys i'm going to scratch everything that i think I Know and start from Zero so please bear with me with my Noobish questions. Like the title says i'd like to swap the B16A engine from a wrecked 1990 crx SI into my DX and i'd like to know what the easiest route (also the cheapest) to do this , the si is far gone so this isn't a choice anymore. 1.-The SI has a P71 ecu in it, is this OBD 0 or 1? 2.- The SI has a jumper harness for the ecu, can it be used in my dx ? If not , Can it be modified so that it can be used? 3.- Why am i missing this connector on my dx.