buddog did pass the time by typing:
> This is an annoying, intermittent idle problem with my
> 1993 Jeep Grand Cherokee (5.2L V8).
>
> The engine will start just fine but the idle RPM will almost
> immediately drop to zero with the engine of course stalling.
>
> Giving extra gas in idle will not keep the engine running
> for long. The RPMs swing up and down in a fight between
> wanting to stall and the extra gas but it always stalls
> out within a few seconds.

Odds are your idle air passage and idle air solinoid are
all crudded up. Grab a can of O2 sensor safe throttle body
cleaner and clean the idle air passage.

ref, the I6
http://revbeergoggles.com/tb/tb.html

Also it could be fuel pressure, how long has it been
since you replaced the fuel filter?

--
DougW