I have afew vans and both seem to have cold weather related starting issues. And I don't mean batteries or fuel. Depending on atmospheric conditions, 1 requires "jacking" the key back and forth to engage the starter. Otherwise the starter seems to work/sound fine. All of them seem to have battery draining issues when sitting a couple days (this even occurs in not so frigid weather). Any info would be very appreciated.

 

what year are they?