One problem related to tank filler pipe and cap has been reported for the 1998 Nissan Altima. The most recently reported issues are listed below.
Whenever I try to fill my gas tank, the fuel backs up after filling 2-3 gallons and spills out. This is the 2nd summer season I am having this problem. Last summer my mechanic said the tank appeared fine. I have to fill the tank very slowly and I often still experience this backsplash of fuel. This happens 70% of the time.