Cold Idle

I have a 1982 K10 Chevy. Had new motor installed this summer. When it finally got cold it started running rough. It would die when I tried starting first thing in the morning. Then after you got it started while I was driving to work it would all most die. I was almost afraid to pull out into traffic. Afraid I would get creamed. So I took it back to garage and had them look at it. They fixed that problem but now when I start it up and it has been sitting for awhile it tach. at between 1500 and 2200 rpm's. and it doesn't idle down until it warms up. Which is kinda bad becuse I work for an emergency service and sometimes I can't sit there and let it warm up. Is there a quick fix to this problem or is there some place I can find info on how to fix it. I'll admit right now that I'm not much of a mech.
thanks :disappoin

What the garage did, which most likely worked is they bumped the idle up to keep it from stalling when you start out. This isnt exactly the correct method to fix the problem but it will work. Your carb and engine both need to warm up to a certain point in the winter time to work properly...thats pretty much why carbs suck. If u want to just get out and hit the gas and go, which you shouldnt on any engine really but fuel injection is what u want because it runs correctly all the time every time. What carb are you running? just stock or did u upgrade? In the winter you can change the mixture settings for fuel/air and improve drivability, but not solve the stalling problem. Long story short; The heat from the engine makes the carb think its summer time.

If you want to undo what they did, grab a screwdriver and adjust one of the screws on the carburetor. I can't tell you where its located because I don’t know what carb the 82 chevys had, but if you mess around with it you will find it. It will be located near/on the throttle linkage.