[carrera73rs]

Good day all,

Has anyone ever run into CIS problems due to weather or seasonal changes?
My 81 SC was running great on Friday of last week, very minor surge on engine start, weather here in Canada in the morning is still around 50.
Yesterday high humidity and fog along with the cooler temperatures.
Large surges which did not stop made car undrivable and caused stalling.
Today dry crisp blue sky and engine runs like advertised again.
Thoughts?
Thanks in advance.