Ok, heres the deal....you can run either an obd1 or obd2 ecu but it has to either be a p72, p13, p5m, etc. I have heard some nightmare stories of peeps trying use their obd2 ecu due to a couple factors. First off, obd2 prelude ecu has an imobilizer in it, unless you get a 96 obd2 ecu. It cost about $100 to take the imobilizer out...(other then the imobilizer no big deal)
2nly, I personally dont know of any places that can chip obd2 ecus....that just something to think about if you ever planned on chippin your ecu...but then again, if you planned on going that far you might as well go hondadata or some stand alone engine management system anyways. I have an extra obd2 ecu from a 99' prelude if you need/interested. You "can" use either wiring harness but I would strongly recommend that you use the prelude harness or your gonna have a horrible time trying to plug shit up. But your simply not gonna be able to use the ECU from your ek. The Civic ecu does not control the secondary butterfly on the intake manifold on the h22. The only ecus that do control the secondaries are prelude ecus and gs-r/type-r ecus (p13, p5m, p72, etc.).
I have also heard very bad things about HASports modified harness jobs. The still leave a lot up to you to wire, so its basically not worth your money. I personally like HCP (
www.jdmshit.com) a little better then HASport. Once again, if you are in need of an obd2 p5m prelude ecu (manual trans), i do have extras. Good luck with everything in the mean time... Feel free to post or e-mail me if you have any further questions.
xxgrapeapexx@hotmail.com
P.S. getting your hands a pbd1 (p13) ecu is pretty tricky...be ready to spend a pretty penny.....