Need Some Help !!! I had a question, ive got a 93 prelude si with an h23a1 in it but i just bought an h22a1. It came with the ecu but the wiring harness was cut. Am i able to use the existing harness that was on for the h23?

It's not exactly the same. There's more wires due to VTEC and VTEC sensors. I'd just save the hassle and buy an h22 harness instead of ghetto rigging it and risking the chance of messing everything up.