The D15b7 to D16z6 swap isnt to tough, but i'm still confused about the ECU and wiring harness what do I do with that? Rewire the car with the V-techs harness and ECU or leave something from the D15? Or, I'm confused?

 

helps to know what year and model car you are doing the swap on. some civics were prewired for vtec.

 

Use the D15B7 wiring harness, and D16Z6 ECU (P28). Then, you'll have to run a few wires.

It is all explained here: https://honda-tech.com/zerothread?id=1019014

 

He can also just plug in the Z6 harness, and run a couple wires if needed. But if it is a 92 it should be a straight up plug and play, my friends was (except for that damn o2)