OBD2 to OBD1

[thermal]

You have an OBD2B (99-00 civics). You'll need an OBD1 SOHC VTEC ECU... P28 from a 92-95 civic/delsol. You will also need a conversion harness. The cheapest one is from Boomslang fab. They are usually in www.groupbuycenter.com and cost $75 shipped.... at least that's what it cost me.

You really dont need to convert, eventhough I would if I was you. OBD1 just runs way smoother for my 99EX. You can always use an O2 simulator on the secondary to avoid CEL. It's weird man. I know a few people who are not using simulators and still OBD2 but no CEL even with a test pipe in place of a cat-converter. My friends 00EX with a 19t is like that for a while with no CEL on the secondary O2 code.

BTW: He dynoed 221whp/195 tq on 10 psi on a hot ass weather. I was very impressed. I told him to "shit can" the e-manage and go Hondata S200b + 440cc injectors.... We havent had any luck with the e-manage so I convince to just sell it. He raced and EVO VIII on a 45 mph roll and kept up........