Snapped throttle cable now car barely idles.

So this is a bit of rookie question. But I was out in my duster and went to get on the gas pretty good and the throttle cable snapped then immediately the car would barely stay idling. I hooked up a phone charging cord to the carb and got it home but still the car barely idles and almost sounds like its about to die when I'm not on the gas. The obvious culprit would be slight tension on the throttle cable the whole time but it always had a little slack in the end. Any other thoughts? I turn the idle up and it seems fine now but I just thought it was odd.