Hey guys,
Emissions tests are due for me over here in Illinois. I was thrown a little bit of a curveball when my car would not pass the readiness checks. I have a 2016 Mustang GT (M/T) with the Roush supercharger kit. I'm currently failing Heated O2 sensor and O2 sensor readiness checks. My list of modifications is as follows:
2.3L Roush blower
72mm upper pulley
1050cc injectors
1 7/8" long tube headers (w/ cats)
2 7/8" cat back
While searching the forums I found a thread from several years ago regarding this topic. A user by the name of Jn2 did some pretty in depth investigation and got some cars with similar setups to pass. However, I have not had luck with his suggestions. Per his post I reduced my Tip Temps by 50 degrees across the board:
Tip Temps.PNG
The reasoning behind this was that since the long tubes are larger than the stock manifold, the temps should be slightly lower. Also per his recommendation, I changed all the catalyst thresholds to 0:
Catalyst Thresholds.PNG
I'm not quite sure exactly how any of these fields work. These also differed from Jn2's cars as they were earlier coyotes and had only 3 fields vs my 6. I have driven hundreds of miles on this tune and have done the 40mph (no cruise control) for 5 mins straight drive (fun on a crowded highway...) but am still failing those readiness checks.
I do have P0420 and P0430 set to "no error reported". Looking higher up on the list I also see some other DTC's set to "no error reported" that my last tuner might've changed:
DTC's.PNG
Do these have anything to do with the readiness checks?
Any guidance anyone can provide would be GREATLY appreciated. The clock is ticking to get this guy to pass.
Thanks