Truck does not want to idle up when it is cold sometimes

It sounds like a faulty idle air control valve. The computer uses the valve to control idle speed by regulating the amount of air entering the throttle body. Its possible the motor inside the valve is weak, or the valve is gummed up. I would unplug the valve when base idle is near normal and drive it for a day or two. If the valve is the problem the idle speed should stay in one place. And it should set a trouble code for the valve being disconnected.

The coolant temp sensor could cause the problems.
If the sensor says the coolant is 15 degrees several things would happen.
The only way to know is to be able to attack it when it happens which would be hard to predict. You could replace the sensor but may never know if it is fixed or not.
The check engine light should have come on when that code was set.

Sometimes on cold days if the cranking amps on the battery are low, then it will be hard for the vehicle to start. Also, check the oil level. If the level is low it will create a hard start and rough idle for the vehicle.

Replace oxegen senser,or check compression for bad valve

YES YOUR CHOKE IS PROBABLEY STUCK OPEN OR BROKE

Take to Autozone or Oreillys for a starter draw test. Sometimes the starter will have a bad place and will not energize to spin the starter.
Another possibility is the Throttle Position Sensor which is located on the airhorn. This balances the fuel and spark systems for the gas pedal. When you start the engine it gives you the base idle and must work with the cold start system.

Hello. I bet your problem is one of these two things. 1: your timing is out. Making it run at such a low idle that it stalls itself out. 2: your truck is running too rich and flooding itself out. Just adjust theb timing a bit and lean the motor out a bit and you should be as good as new! Hope this helps!

Depending on youre mechanical ability you can spend 20 bucks for a rebuild kit on your carburator.

There tends to be many different potential issues with youre description of the problem. My best advice for you at this time, would be get the carburator re-built and check youre fuel pump/fuel filter.

But you can always go to youre local shop and get a free estimate.

Have you checked your glow plugs? There are a number of additives you can use. Go to Amsoil.com and try some cold start. I sell this stuff and alot of other things for diesels. I invested in a small code reader from my local auto parts store to help me diagnose my truck.

If carburated, I would suspect a sticking choke, making the fuel mix way too rich.