Originally Posted by onyx

there is no way to do it unless you get a japaneese emulator. The P28 OBD 2 ECU's dident use knock sensors. They have 2 main rom chips on the board and they are VERY expensive to get the chip. they are $80 to $150 per chip. Go get a conversion harness and an OBD 1 P28 if you want to be able to chip it.