'89 200-Rough Idle in Drive

[Shawn Kolu <skolu@getnet.com>]

My '89 200 Turbo (sorry 2 WD) with 3 spd Automatic has a very rough idle 
when stopped at red lights, etc.  It often stalls out while stopped in 
drive with the brake applied.  Takeoff is rough, but if I feather the gas 
pedal I can get the revs up and then it seems to drive just fine.

Interesting note idle is fine in neutral and while stopped in Reverse

Anyhelp out there?  LED diagnostics are clean.