Car runs rich wont pass smog
 

This is my second time and still I can't pass
I have a new magnaflow cat and magnaflow mufflers.
Thanks

high NOX = too hot = too lean. the one i had that failed with high NOX needed an o2 sensor, so i would check yours. there is a diagnostic port you can put an LED into, and you can then see the 02 sensor cycle when its in closed loop, or not if the sensor is dead