[V8] Car stalled - code 2111

[FreddyP]

Hi Gang -

My trusty beast left me stranded for the first time in over ten years the
other day.  Died at a traffic light a couple of miles from home.  It
restarted and then died while under way about 30 yards down the road.  I
rolled into a parking lot on a side street and did some impromptu diagnosing
to no avail.  Luckily there was a sandwich shop right there and I walked
home eating my lunch.

By the time I got my truck, borrowed a friends dolly, and got back to the
car - guess what?  That's right, the V8 started right up.  So I drove it
straight home and then walked back to get the truck (no sandwich this time).

Pulled code 2111.  Does a faulty RPM sensor fit these symptoms?  Isn't there
another sensor right there next to the RPM sensor?  Should I change that one
while I'm there?

TIA!
Fred
'90 V8