This is from the dim and distant past....
Accel times OK? Acceleration is set on the AFRCU, and from memory it does the intake sensing.
I would try setting the accel to the lower, shortest limit, see if your overswing comes back.
If it doesn't then I would try the AFRCU. We used to set them at lowest accel time, set the Governor to 100.5, that would overswing to 102.5, which I think is the limit.
Usual, I have no manuals handy, so see what your maintenance thinks.
I did set up a few, though...