without starting the engine ,,turn the key on (no start) if u here the noise,,then open the
gas door remove the cap as u listen again as the pump only runs for 3 to 5 seconds (once the key is on
and the fuel has drained back do it again to be sure that is where the noise is coming from.
the e-vac blower located behind the drivers headlight( that big black thing) if it is going it will Howell..jim