Went through the platinum routine.......back to standard.
Problem exists only upon start-up or from full stop.
Runs great at any speed and idles fine.
Start-up problem gets worse when warm as time from shut-off increases, ie., 5 minutes OK but 45 minutes bad and 1 1/2 hours terrible.
Acceleration from full stop - engine stalls when punched (in other words no left turns unless there isn't a car for miles!)