2014 370z Engine cuts off while driving, HELP!!!!

engstah

Code p0101 showed up. Took to the dealer and they couldn't do much. Charged me $75 for a diagnostic fee. They said it was my intake and test pipes. They said the test pipes and intake messes up the air/fuel ratio which causes the engine to stall at random times. They recommended me to get a tune so it can be fixed. I never did an ecu reset to my car after any mods. I just did the ecu reset and my car feels like its running MUCH better. Throttle response is much quicker and there is way more power. I just upgraded to 20' wheels from 18' and the steering response got better as well. Before the ecu reset, the steering wheel was stiff and hard to turn. After the ecu reset, the steering wheel is free and reponds well. Does this have to do with air/fuel ratio? I did the ecu reset so it can relearn the correct air/fuel ratio in order for the car to run better. So far no problems and drives like new after ecu reset