Running like crap when it's cold outside

When was the last tune up? What engine you running? How many miles on the motor? Could be several reasons as to why it's running like a dog. Make sure you have proper antifreeze levels and clean oil in the crankcase. Check the choke on the carb to make sure it is opening, check ignition timing. My Duster runs fine when I start it up when it is cold. I do let it warm up for at least 10 minutes in neutral with the parking brake set so the tourque convertor can spin and warm up the trans fluid.Check your thermostat also to see if it is operating properly. It could be just a simple tune up or carb adjustment or even a fluid change .