I am new to this please help. I have a 97 civic that I bought, the motor was a b20 (unknown) and I put in a B20Z from a 2000 CRV. The ECU is for a 94 Integra LS and I am having problems with the engine missing, surging and running like crap. What ECU do I need? Is it possible it may be more than the ECU? Any help is appreciated. Thanks.