Engine Hesitation

On my 88, when i first start it up the car is fine, after about 1 min the car starts acting up as if it wants to stall, if you rev it up the car its fine until it idles back down then it'll start acting as if it's gonna stall... once you go though the car is fine, no hestitation or anything.

I think my Throttle Body is the culprit on this. I have a feeling that it has some build up by the plate causing this to happen. Now should i be concerned that when i take off the air filter cover after the car was running and see "smoke" coming out from the throttle body :sly: ? And if i were to clean it what's the best cleaner to use? I've only seen one at pepboys by STP

i wouldnt be too concerned about the smoke of course someone may have a better opinion on this, sounds like it could be a little moisture or unburnt fuel excaping.... any carb cleaner should work just be careful around sensors. ive used bg products and they are pretty good just a little pricy...