Sounds to me like the 'hiccup' I get...but definitely not the I/C pump.

If the car doesn't hesitate beyond 3,000 rpms, your pump is likely fine.

My car has this 'hiccup' when it is cold, or sometimes when accelerating from a stop. I installed a sprint booster and took care of it. I recently un-installed my sprint booster to let a friend try it, and my hiccup is back. That leads me to believe it is drive-by-wire related.

SQ