I've been having this problem with my Q-jet running like crap in the cold, especially when it's humid out. What it would do is start up fine, then when I kicked it down from fast idle (or about the time I got to the first stoplight in traffic), it would barely idle and normally die if I didn't hold a decent amount of gas. After it heats up, everything is beautiful. I did some net searching and then went out and looked at it this morning (40 degrees, foggy) and sure enough, when it's running like crap, I can see ice down in the carb. There isn't a lot, but I can see it building up around the venturis and the butterflies at the base (looking straight down with a flashlight). Has anyone else ever had this? I never had this problem with my Edelbrock carb. This is my first winter with the Q-jet (not counting Arizona winters /forums/images/graemlins/tongue.gif). I doubt it, but is there any easy way to solve this? I'm sure I shot myself in the foot with the open element air cleaner. The best solution is probably to put the factory air cleaner back on with the heat riser. I've got Doug Thorely headers that have a little thing welded on where the heat riser plumbing can be attached. I don't know how well it will really work though. Any thoughts are appreciated.