My wife has a 2006 Nissan Altima and it is having trouble starting sometimes. It happens when there is less than a 1/4 tank of gas and sitting cold for a while. You can turn the key and it will try to start but won't turn over like its not getting any fuel. Anyone have any suggestions? I've read that the fuel filter is in the gas tank on the fuel pump and rarely needs changed but I dk, I try to stay away from working on foreign cars.