So i recently gutted my primary cats and replaced my secondary with high flow cats because of a rotten egg smell. before that i had a CEL for one of my o2 sensors. my question is it still possible to have the rotten egg smell even after my cats are gutted and should i just change the sensor to help fix the smell. (i have rr racing tune so i dont have a CEL for cats.)

 

It depends. When did you get rotten egg smell? i.e., was it all the time, or only when you apply heavy throttle? Cause... if the latter is the case, that's pretty much accepted as normal on these cars.

 

usually when im in the higher rpms is when it gets bad