Hello! PM6 si ECU is an OBD0 ECU for 88-91 Civic Si. Your car need an P06 ECU (92-95 Civic DX) or remapped chip. U see the OBD0 uses 16 teeth crank sensor whereas your OBD1 ECUs uses 24. To fit a PM6 ECU into your require a OBD0 wiring harness plus a 88-91 si distributor. We have some P05 chip but they only modify the rev limit so it won't help in your case.