Just something else that just "MAYBE" worth a look...If the purge valve is stuck open...It will be a vacuum leak that could cause a low rpm miss...Purge valve malfunction do not set a code...

I had a purge valve problem with my 2014 RTS several years ago...It would stick open and cause hard starts when hot...when it would finally start it would act like the engine was flooded.. (and it was with gas fumes) Had to give it a a couple of good higher rpm's runs and all would be well...Till it decided to act up again and who knew when that would happen??? I ended up venting the gas tank directly to the atmosphere and blocking off the purge valve...Problem never reappeared...larryd