Northern VA has some pretty strict emissions regulations. They basically take any obd2 car and hook it up to a scanner. If the ECU passes, then the car passes emissions. My problem is that I don't know exactly how/what is checked. I want to do a swap on my car, but my car is a 2000. I would like to swap an obd1 engine into the car. I know that one must swap a newer engine into their car if doing a swap. A newer engine swap would cost me about $4k. But my question is this: If I were to swap an obd1.engine into my car and get all the wiring straight, would I pass VA emissions? What is checked when the ECU is plugged into the emissions machine? Will I be ok as long as the obd2 tester throws no codes?