History of the carb? New? Rebuilt? Used and just trying it out? Etc. Have you look the linkages over to be sure they are no bent or messed up in some way. Manual or electric Choke?
New, well only a 1000 mi. on it but has backfired on cold startup from the git.
Electric choke, I`ll give the linkages a look see, but I never abused it.
