Truck will not start when cold outside.

it cranks, but doesn't start. Some friends said it may be the distributor coil?

This truck does not have a distributor, by the way. The coil could be bad, but is only one of many possible causes. First you need to find out if you are missing spark or fuel. Then depending on what you find, a series of further tests are to be done to find out what specifically has failed.

OK, I'll try to get started on the troubleshooting, but with it being in the teens at most outside, it may have to wait a few more days. I'll let you know that I find out. Thanks

I did have good pressure on the fuel rail, didn't have a volt meter to test voltage to the plugs though. Of course since it has warmed back up here, in the 40's to 50's, it started without a hitch. Still tries to stall out unless it has been going for about 10 minutes or so though.

Sounds like an air intake issue. Seriously, being that it's hard to keep running cold. If the engine is allowing air in, and the engine is cold, it's very hard to start, and hard to keep running. So, air is leaking in somewhere - through a sticking idle air control valve, through a broken air tube or air box, through a vacuum leak somewhere.

Well I've checked all the hoses and everything I know to check for air leaks and not seeing or hearing anything. Tried a new coil pack and that wasn't it, thankfully. Its now doing it even with warm weather, so I'm totally lost as to what it could be. The engine is turning over, there is spark and fuel coming through so I'm at a loss. Someone suggested timing belt may have went out.