Iac code help

[Dusten30]

I'm have a obd2b and when stock ecu is plugged in it idles fine but when I put in hondata I get an iac code I tried plugging the black/blue wire straight to the ecu but still get iac code and my car was an automatic and switched it to manual don't know if that matters

[Spunkster]

What vehicle is this and what engine does it have?