Just posted a thread with same prob.! Must be an update prob.! I got stuck in the street too. But I have a 14 challenger 5.7. Hope it gets fixed.

Dont know if I am doing something wrong. Just got the tuner and up dated it on the computer. I did the whole pcm process and then did the 91 flash and tried driving the car (only took Rev limiter off). Car will not accelerate, seem like it is losing signal to the throttle body. Any ideas? 14 ...