So my dad and other observers tell me the white bumper should not be black over the tail pipes and it is running rich. No codes and I reset the ECU and it idles at 850 smoothly on start up. There is no smell of gas and the gas cap is tight. What sensor should be adjusted?? It has had some of the pollution devices (ERG and AIV?) removed. Still has carbon can and Cats if that helps with the suggestions.The cat sensors were changed out 20k ago. The car just smells like old car pollution when I park it. There is no gas smell.Thanks for the advice..