Thief, your steps are exactly what I thought I'd done and
what the FSM says to do. But I'm going to take the throttle
body off the truck tomorrow so I can replace those screws
and more easily check the setup on it one more time.
I also will be checking the AFM and EGR too, just because
I've got all day tomorrow and nothing better to do.
That and I've been doing more experimenting and notice that
the problem seems worse when the motor has warmed up...so
could be an EGR system problem too. Unfortunately the FSM
lists almost everything as a possible cause...talk about
CYA. <img src="/forums/images/graemlins/rolleyes.gif" alt="" />

I appreciate all the replies. <img src="/forums/images/graemlins/kewl.gif" alt="" /> At least I feel more
confident that I'm on the right track to solving this.

-Indy