I have had an 89 Crx Si for several years my cousin blew a few holes in the engine and I got the car back from him so now I thought was a good idea to swap a new engine in it. I have had a little bit of trouble because he pulled the old engine out and I really did not see how it all went together. I bought a B16a w/S1 transmission. I have most of everything hooked up, vtec, axles, pr3 computer, shifter, etc. I am stuck on one thing. Above the right shock tower is a plug. I do believe that it is for the fuel injectors. Being that my old engine was an si and that there is a injector resistor I think that my old engine was a mpfi. The problem is that the connector on the car side is a big circle plug and the engine side is a big square plug. I have searched endlessly trying to find an answer for what to do. I must be just missing the answer somewhere. PLEASE HELP ME!!!!!!!!!