Trouble shooting this condition now too.
I tried the turn it on, put the go pedal to the floor for 15 seconds, release for 15 seconds, put the pedal to the floor for 15 seconds, then turn it off, release the go pedal, wait 30 seconds then start it up.
Think it relearns throttle body position and maybe some TCM learned settings.
seems better, but it also been warmer and could be a temperature related condition.