It does not seem to make any difference whether it's cold or not, it always sputters at first when the peddle is pressed. And it always stalls when placed in D, so far.
I will try the OVP, I didn' t think that's what it would be because all of the lights and electronics work. But I'll check it and let you know.
I find it interesting that the "Potentiometer" was pointed out because the first time car started having trouble is it was also turning a corner. hmmm, coincidence? I am not entirely sure what that would do, but anyways...