did mpfi swap. i get code 20 .. but i think thats cuz its a 88 ecu in a 91 civic.. and i get code 9 cylinder position sensor.. i changed my dizzy car runs better.. still get code. i reset the ecu many times still comes up.. did the trouble shooting. checked ohms they were good checked continuity and there was non.. what could be the problem.. and sometimes around 3000rpm my car will hesitate does, and recently my stereo will just turn off then come back on, does any of that have to do with code 9? anyone know whats going on with my car?