My 95 OBDI Jetta has a funny throttle response during shifting. Under acceleration, when I take my foot off the gas pedal and push the clutch in it revs higher by a few hundred rpm. Also, if I take my foot of the gas and leave the clutch engaged, there's about a one second delay before I sense deceleration. I checked the butterfly on the throttle body and it moves quite freely.
Any ideas what would cause this?