I have changed a couple of things with the setup, not much. Used to log 13 and 36. Deleted all of the other codes unrelated to tuning. Now just 36. when this happens it is kind of random. Could be pulling off at the stop sign or even when launching the car. Sometimes cruising but never at a speed over 35 MPH. I would Suspect that it is due to one of the changes that I have made to the spark tables . AFR's are 12.1 and it pulls ok I guess. Anyways the car shuts off and turns back on while I am driving and that is unacceptable.