Quick question about the dreaded surge??

I have read up and performed alot of tests on the sensors and they check out ok. I pulled codes and all set there- codes present are for deleted smog. I am going to purchase a break out box for my car but have 1 small question before it arrives. I am having a surge and when I release the throttle I get 1 surge everytime. Is this a sure sign that in fact the IAC motor is not working properly. I thought I had read where this was a sure sign that the IAC is faulty. I have read so many items it makes my head spin. Thanks

Thanks, I have tried cleaning the IAC a couple of times with carb cleaner spray but has not changed the outcome. I have come of that stlye carb cleaner at work and I'll try that one last time.
Is there a way to test the sensor while off of the car. I have ohm tested it twice and it is within spec. I have tested for 12 volts and ok there. While moving the plunger by hand will the ohm of resistance change?? I am wondering if this sensor may have a "dead" spot and would any test show such a problem?? I also wonder if the sensor "goes to ground" like a short while in operation, and just stays to ground?? Just some thoughts I have had kicking around. Thanks