1993 Cavalier 2.2L Throttle delay when cold?

Throttle delay when she's cold. Whether it's from a full stop or driving 55mph, barely touching the
pedal or slamming it to the floor there is a slight delay (maybe .5 seconds) until it takes off. After
about 10 minutes of driving it is back to normal with an immediate response from pressing the
pedal.

Throttle position sensor maybe? 210k miles on the car btw.

This may be unrelated, but also from a cold start I've had it up and die when put into reverse.
Usually after not being started for a few days.