2013 Mustang GT automatic, in early September my car was ready for NJ inspection. I failed for 02 sensors and heaters not ready. At that time my car had PMAS 120 mm CAI, dyno tuned, and Pipes X pipe (factory cats are there and untouched). I went back to my tuner and he did adjust the 02 sensor settings. He put them back to stock settings. Did about 8 cold starts and 250 miles, they are not set. I went back, we set everything to stock, air box and tune. 350 miles about 10 cold starts and monitors are still not set. Only thing on the car is the Pipes X pipe. I did have a mild leak and I got it sealed up and 2 cold starts since then and 70 miles. Still not ready. I do not have the factory H pipe anymore but doubt that is it? The other monitors set in 1 cold start and 10 minutes of driving. Do I still need more miles? I have done 4 times the Ford O2 sensor set test, 4 minutes of 40 mph (no brake/ no cruise control) then rev engine to 4800 RPMs for at least 10 seconds. Am grasping at straws. Any help/ suggestions will be helpfull.