[Boog]

Does it idle unusually low?
The idle air control slows rpm drop to keep the engine from dropping too fast and dying.

My '91 had a sticky gas pedal and when pressed harder to accelerate it would then lurch. Mine also idled real slow and often died when stopped with foot on brake and it in gear. The IAC controls idle rpm for the most part and I am told it can get lazy. If it allows the throttle blades to close too far they can stick in the bore as mine did. That's where you get the lurch.
There is a hole on the front of the throttle body on the driver side front you can see in the pics. Normally there would be a plug over it but yours appears to have been removed. In that hole is a torx head "minimum idle speed" screw. A T20 I think it is. It is factory set to the minimum idle speed necessary to keep the engine running in case the IAC doesn't. If that plug is missing on yours someone may have turned it out thereby lowering the minimum idle speed and creating your issue. I began by turning that screw in a half turn at a time to see how much difference it made. You are supposed to unplug the IAC while you do this and jumper pins A and B of the diagnostic plug under the dash. You can google the procedure but that's pretty much it. It is covered in some repair manuals.
Of course timing and such should be checked first and set to spec.