As far as passing emission, if you convert to obd1 you will need to keep your obd2 ecu. When you have to get emissions you will have to put your stock ecu and injectors in (I wire the new injectors and can leave the oem clips so you can go back and forth). Also, you will have to drive for about 50 miles to let the ecu go through the readyness check. Car will run normal on stock ecu and inj as long as you don't boost. Let me know if you have any other questions.Originally Posted by ghionw