Ok...I tried searching but wouldn't know exactly what to search under.

I have a 1990 crx HF with a B16 all ready wired up and running. My interior harness is a huge mess where it connects to the ECU. Do i have to use an HF harness or can i use a DX or Si. any other harnesses that i could use?

And no im not that good with wiring to make my own

 

You going to want to stick with your trim level harness. Which in your case mean 90-91 Hf. You could use another harness but you will have to rewire which you already said your not really wanting to rewire something.