Have a 1998 Civic Dx with a 99 B18b swap. I am haveing a idle issue with it. I used the stock 98 Dx wiring harness and running obd2 p75 ecu. I had to do the IAC 3 wire to 2 wire conversion deleteing orange wire. The idle is rough at 1000 rpm, cold start. When i plug the upper hole in throttle body it stops. I am wondering if anyone has had this issue. Wondering it the problem comes from the IAC conversion or a bad IAC. Dont want to go buy a $150 IAC valve and it not fux the problem. Have taken the IAC valve out, supplied power and you can hear it click. Just wanting some input on issue before i start throwing parts at it.... It is not a daily driver.
