Thanks to the many of you who have been helping me sort through this
problem. Recapping briefly, van fires up without problem but then
immediately sputters, stumbles, kicks and dies. Good fuel pressure, no
vacuum leaks readily apparent, good spark even as it is winding down
into a stall.

Replaced Temp II sensor, checked and cleaned grounds, etc.

What I have found is that the idle stabilizer control unit has a burnt
transistor or two. I'm guessing this could be the culprit, though I
can't say for certain. What I can say for certain is that the price tag
for a new ISCU caused me to spit a mouthful of miso soup all over my
computer screen -- so now I have that problem too.

I'm tempted to try to fix this unit or try to find one in a boneyard.
Does anyone have any kind of schematic for the 251 907 393B? I saw a
great post on this from Jim Davis, circa 1998; but only limited
information was available.

Thanks in advance for any further guidance.

Erik Walker
Lempster, NH