Not really.. if it is a little tweak of the air screw or dropping the slide a bee's dick will see it gone.
Usually a hanging idle/racing/surging will present more so when the engine is at full temp and has had a load on it.. Think of what happens as you run out of fuel and she starts to nang and race up before it dies.
Like this..
https://www.youtube.com/watch?v=FM4EUKrrymM