trouble running when cold

i posted on here once before, i thought the problem was fixeed but it wasnt.

certain times, especially when its cold, my car has trouble starting, once of the cylinders seems like it wont fire, and it sometimes does this once i get it to fire. i will drive off and then the putting on 3 cylinders starts. also, in cold weather it sometimes drops out of drive to neutral and back. the dropping out of gear isnt the major problem, however having a cylinder shutting on and off is the major problem.