[Vwdiesel] Strange IP Problem

[Val Christian]

It's happened a couple of times, usually shifting from 1st to 2nd.
Shift into 2 (or 4th), and power drops to idle.  Foot pedal is not
responsive with car in gear, and car slows down.  Push in clutch,
and rapidly operate the foot pedal, and things get better right 
away.

The idle power is smooth, with no roughness.

IP crowd, any ideas?

Val

car: 98 Jetta, IDI, 200Kmiles on pump, AC and all the usual power
grabbing options.