Since it's been getting colder here the truck will start right up in the morning, run for a couple seconds then die. When I go to turn it back on it just cranks and cranks until it starts to kill the battery. Once it gets warmer outside it starts up and is fine the rest of the day. It can't be the diesel when the weather is only getting to 30 degrees at night, right? I just changed the fuel filter and it's still doing it. I would think glow plugs but it wouldn't start right up if it were. Maybe I'm wrong but it seems like it's not getting fuel. Any ideas???