Ok, back when I had a B16 in the hatch, I got a jumper from JHP and a p28 that I had in one of my older cars. I hooked up the jumper, wired up the 4-wire o2 sensor, and it threw codes for the ELD, IACV, and o2 sensor. I switched the 2 black wires on the o2 sensor, and the o2 sensor code went away, but I still have the codes for the IACV and ELD. I didn't change ANYTHING other than the o2 sensor and ECU, and the ECU didn't throw any codes on the B16 in my old 4-door. Now I put the B20/VTEC in the hatch, and still have the codes for the ELD and IACV. I put a new IACV on, and still have the code. I didn't do any wiring for the IACV, it's the same as it was on the stock harness (and the same as it was when I had the PR3 on the B16)...