Thanks for the help guys.
The directions that came with the IAC said that after reassemble the rpm may be high (1800-2000) and to drive it at 40 mph and that would cause the
ECM to command the IAC to re-set. That'* why I asked.
I did wiggle the wires around while it was running to see if that caused any change. I also sprayed around the intake and anywhere that looked like a vacuum connection with carb. cleaner but didn't get anywhere with that.So I put it in the shop this afternoon and hopefully they,ll find the problem.