My mechanic had my van for a week and the only thing he could find that
he thought was causing sporadic engine shutoffs was a dirty fuel filter.

Engine runs great, except that it will shut off on its own when idling
for more than a minute or so at a traffic light or when I turn into my
driveway.  I coast by house next to mine and make a sharp right turn
into my driveway.  Engine starts losing RPMs.  Idle stabilizer tries to
recover lost RPMs, but can't do enough.  Engine immediately restarts.

Above happens with full fuel tank or near empty one.

John