I have a y7 block and i am doing the y8 mini me swap. I have the y8 manual harness and p2p ecu. The original harness was the y7 auto but did the manual swap with the original harness and ecu. When I went to put in the y8 harness and ecu, I ended up with 2 of the same conectors. one of them was from the y8 harness and one was from the y7 ecu to the engine fuse box. These plugs the largest plugs on the ecu refered to as plug A.

 

So you have an OBDIIb harness and ecu?

 

Yes

 

first mistake: changing the harness

change the ecu
do the 3 to 2 wire iacv thing
change the iacv clip
pass the vtec wire and pressure and ur done

 

If the harness is for a Y7 then it was an HX and all HX's use OBD2A configuration. Even 99-00.

 

Thank you that's what I needed to hear . Can you post a link to these steps? thank you