jwoods61us wrote:
OP, did you try the old method of a can of carb/TB cleaner, spraying everything? The reason I say this is your issue is if I read your original post correctly, with the idle circuit; there is a pin hole in the TB that sometimes starts to gum up and restricts airflow causing the idle air solenoid to work harder and the idle to degrade. Spray liberally while engine is off, then restart (sometimes a hard start) and see if it goes away. Possibly a $5 fix.
. I ran a can of seafoam through TBI before the trip. Is that pin hole about 1/16 of an in just above the throttle plate? If so I stuck a small wire in there to insure that it was not clogged.