Howdy,
        Some talk has brough me to ask this question: What is causing my idle
to "bob" up and down and how do I fix it? It is an '86.  At idle, around
900rpm it bobs up and down from about 850 to about 1100 and really bugs
me.  It is a relatively quick thing (a bob not a surge).  When I
disconnect the idle stabilizer it seems to go away but same is true when
I disconnect the little, upside down black box next to and connected to
the right side intakes (I think it is called the idle control and had
two allen screws facing up for adjustment - mine are corroded of
course!).  Which, if either is it?

Eric