cold weather edelbrock

one question, when it starts running bad, is the choke still closed (assuming elec choke)? I have had to tweak the choke on mine a bit as the temp changes.... another thing I have done is let it warm up for 5 minutes or so then turn it off for 5-10. It seems like the engine starts to warm up but the cold air coming in the carb keeps it from warming up at all. turning it off for a few minutes warms it up enough from the bottom that it runs fine after that....