Where is the fuel located on 1998 Acura cl 2.3 liter

If you mean the fuel tank, it is located underneath the rear seat. If you pull the rear bottom seat out, you will see a weather cover with wires going through it that connect to the fuel pump and level sensor. Remove that and you'll be looking at the top seal of the fuel pump. If you have to do any work inside the tank, be sure to go to Honda/Acura and get a new O-ring seal for the fuel pump. These tear and distort easy and if not sealed properly can cause issues with fuel leaking or the fuel system not being pressurized/regulated like it should be.