Sunday I finally started my LS/VTEC build and it started right up but I have 2 code, Code 9 which is the NO. 1 cylinder position sensor so I read my books and its says to replace the Distributor so I did with a friend of mines and the code still appeared. Now for the code 41 which is the Oxengen sensor I changed my old one for a new one the code went off, I started the motor up 30 minutes later and the cade reappeared can someone help me out. These code are still pressent after unplugging the battery thanks guys please help me 91 EF converted to OBD1