This may not help you but in MD we have emissions testing every other year and they have a $ cap in how much you need to spend trying to fix your emissions. I believe if you spend $150 or more on repairing your emission and still fail you get a waiver. Check and see if Nevada has such a waiver. Emissions testing has been very controversial here in MD ever since they started the program. The cap is so that people don't go broke trying to fix there car for the emission test... Mike C 2109