not really all that cold, we see single digits a few days out of the year, most of winter morning temps in teens to 20's. maybe i just need a good tune up. all i know is that once it gets down around 30 or so outside, the truck will start initially and then die, kind of like its emptying the gas in the carb or the the fuel line. then i have to crank it a few times and pump the accel to get it fired back up. it runs kinda rough for a few minutes till the engine gets good and warm. just tryin to remedy that. any suggestions are welcome.