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the CRX DX chassis harness does not have the wires in it, running to the engine bay, that are required to run MPFI - the only engine harness that will plug into your CRX DX chassis harness and work is the 90-91 CRX DX harness - you will need to make the DPFI to MPFI wiring changes to the DX engine harness (add 2-wires for injectors, add 2 wires for Cylinder sensor, extend wires for TPS and swap a couple of them around, extend wires for the EACV and swap wires around at the ECU connectors), change distributor plug, extend wires and swap connectors for the cooling fan switch, extend wires for the MAP sensor, buy an OBD0 to OBD1 ECU jumper harness, add wires for VTEC and add wires for the 4-wire O2 sensor - i am probably forgetting something, but that will get you started