That probly normal when running the DS out of it
Both of mine will die sometimes when you have been WOT for an exteded period of time.
Then as soon as you let off the throttle it dies
Probly due to the sudden vacum change
I was doing some rev donuts yesterday too in a kroger parking lot
A police officer was so kind to stoped by and told me I should go do that somewhere else
At least I didnt get a ticket.
I even tried to blow the motor in the GT for like an hour with WOT, that pesky rev limiter