Very Helpful thank you. i’ll make sure to get some MIL eliminatorsThe upstream O2 sensors will continue to read and adjust the A:F ratio as normal but since the downstream O2 sensors will detect that there are no cats, they'll trip the CEL. You can either have the downstream O2 sensors disabled in the tune or install MIL eliminators to trick the ECU.
I've run over 150,000 miles without cats and without a tune. CEL light on the whole time. Car has 290,000+ miles on it, no troubles from no cats.
That's good to know. The only thing is that with the CEL on the whole time, how will you be alerted if a new problem develops unless it affects the way the car
I'm thinking of going catless as well, but can't for the life of me find the MIL eliminators for my car. I can only find them for the 96-04 mustangs. Would those still work? I would rather not have the dash light on all the time, I'm kind of OCD about that sort of thing.