Originally Posted by D-Rodman
You'll have to disable the tgv sensors on the usdm ecu or you'll have codes and a check engine light. When you swap the ecu you'll have to drive about 50 miles keeping it under 60 mph to clear all the monitors. I got my inspection sticker with the usdm ecu, the dmv machine wouldn't communicate with the jdm. Now I know how to do it, my usdm ecu is in a safe waiting to get used again next year.
I think that response is to bugeyebetty, but yes, you do have to disable the tgv related codes on the usdm ecu. Just set your injector scaling, fuel and timing tables accordingly for your mods. It doesnt need to be perfect but close enough so you arent dumping fuel if your state uses the sniffer.
You don't need to drive 50 miles, etc... just force pass the readiness monitor bit on.