318 hard start when hot

After a little further diagnosis, the alternator does not charge (probing the terminals at the battery it is 12.6) until the truck breaks the "C" on the temp meter. As soon as it's above cold, it jumps up to a touch over 14v, 14.2-14.4ish. Tested voltage at the coil too, with it running, it's putting out about 3v. Did not have another person to help me test while cranking. Another issue I've noticed is the truck once it hits the middle of the temp gauge, does not want to idle. Still waiting to do the starter as it's been so cold I can barely hold a tool for 3-4 minutes without it literally freezing to my hands.