3.3 V6 with EGR and headers with cats together. I been having issues with 2 codes. My recent repairs were all 6 injectors and 2 new upstream 02 sensors deleted 2 downstream catalysts, Pacesetter headers direct fit with a flowmaster muffler. From inspection and not a bench test yet I dont see how both sensors remain at a high temp for so long causing the high voltage seen from the sensors. Please I need some guidance!!