Strange hesitation 4kq

[Bob]

My 4000Q developed a new habit over the last couple of days...  It has
this strange hesitation for the first 60 seconds or so of driving, but
only if its warm and if you load it.

Cold in the mornings its no problem. Hot driving is no problem.  But if
I were to drive 2 miles in the morning, let it sit for an hour or two
and come back, it hesitates. Not during idle, just under load.  Today I
noticed the tach drops during the hesitation which makes me not think
fuel delivery.

anyone btdt? Hall? ICM?

TIA
Bob