Me and my friend just swapped out his old D16A6 out of his 91' Civic and put in a B16A in and then he took it to the shop and had it wired for VTEC and it starts and runs now but the ECU's throwing 2 codes #'s 8. and 9. (8) is the Top Dead Center sensor and (9) is the CYP cylinder sensor. Does anyone know how to replace these and where they are??? Just out of curiosity what about is a 91 hatchback with a stock b16 soposed to run in the quarter mile? Thanks!!