Thanks for the post. Ultimately, I did the penny trick, which seems to have resolved the problem. Still don't know whether the problem was the ICV or the ICU, but who cares, It's kluged for now!!
On to getting rid of the stutter in my accel. I'm thinking that my CAT may be shot, which might also explain the cycling idle. Guess since we don't have emissions here, I'll just have to remove it!.
Douglas