ive put tons of miles on my 03 cobra after reflashing the computer and still cant pass inspection. On the motor vehicle report i pass every subject besides the cats. The cats come up as "not ready". After trying many different types of drive cycles I ran out of ideas. I decided to try datalogging the 02 sensors since they are what tells the computer how efficient the cats are. When reading 02 sensor voltage the 2 front sensors fluctuated constantly in the 0.5 to 0.7 range but at one point it spiked as high as 0.962 and as low as 0.232. As far as the rear 02 sensors Bank 1 stayed at 0.00 and never changed. the bank 2 sensor stayed at 0.03 and fluctuated between 0.02 and maxed at 0.04. Does anyone know what this means for the rear 02 sensors?