Hey man, I've got the same problem as you, when I come from a stop and I take off either in Drive/2nd gear, the whole car is shuttering barely any power is being made.
Big problem is, I'm not getting any codes thrown at me from MHD or Carly Adapter. I'm hoping you have fixed the problem and if you have, what caused it as I'm going through the same stress right
now🤦*♂️