I have a 2002 Dodge ram 1500 5.9 liter 4x4. It is really cold outside and just about every morning the truck will sputter for a few seconds on the way to work. Then the truck can set outside all day and will not sputter again on the way home. It will only sputter when you first start out then it will not happen again until the next day. Any ideas on what to check out? Thanks