2005 Nissan Titan fuel system problems

The other day I was sitting in traffic for almost 30 min stopped with the engine running (lots of christmas traffic on the 5 south freeway), I put the truck in park because I notice an accident. I had my windows up and my cabin air on. Then a few min later I started feeling dizzy almost fainting. The car next to me saw that I was struggling, came to my window and asked me if I was ok. I rolled down my window and he noticed the smell of exhaust inside my truck. After my headache went away.

Was accelerating after coming to a stop at a stop sign. Got up to about 15 MPH when all of a sudden the engine died in the middle of traffic. Tried to restart but could not. Coasted into a side street. Fuel gauge indicated that the vehicle still had 1/8 of a tank of fuel. After putting in about a half of a gallon of gasoline was able to get to a gas station. Once truck was full it ran with no problem. A week later I ran the fuel down to the same amount (1/8) where the truck had died before.