Me. I have a working Cat convertor and EGR hooked up and working to get through emissions. We have the treadmill test here in Maryland.
I had an open loop chip and it failed horribly at idle (to be expected, it idled rich, and had no EGR).
I replaced the chip with a closed loop chip and it passed. I have a Translator plus, Z06 Maf, RJC power plate, and other mods on the car. Car is not stock, but runs well.
Hope this helps
Billy
Montgomery Village, MD