very rough warm starts (popping) HELP

I have a 1994 pontiac grand prix with a 3.1L engine For the last several weeks when I start my car after it has been recently run I will get several loud pops (5 or 6) and then it will stop and idle perfect. It doesnt happen in the morning after it hasn't been run all evening but is most likely to do this after I go to lunch when it has set for 1-4 hours and then again when I leave to go home it will make this popping noise. It seems to not happen quite so bad or often in cold weather. Any help?????? Thanks.

Welcome to AF.

It would help to post your year, model, engine size and mileage.

just a question i am not ready to guess yet. have you changed your sparkplugs to another type or brand than OEM