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OBD1 ECUs are the only tuneable ECUs for Honda/Acura makes/models (other than standalone ECUs)for 1988-2000 vehicles. You cannot tune OBD0 or OBD2 ECUs. OBD0 and OBD2 ECUs must be converted (via an ECU jumper harness) to run on an OBD1 set up. OBD0 set ups must also be converted to an OBD1 distributor set up.