First, let me say how much I hate socal!
Ok,now to the problem:
CA has pumps with a funky vapor recovery thingie. They are worried that a a few fumes from the gas nozzle will go up and pollute the air (while they ignore the illegals driving around in an uninsured '82 Toyota with smoke coming out of the exhaust, but that is another thread).
So, when filling, you have to defeat this contraption to fill the tank. You might kill a few flies, but it beats walking home.
When filling, hold the nozzle and trigger with the right hand. Grab the rubber thing with the left hand shove it up into the pump. Dispense fuel with end of the nozzle pipe about an inch above the gas tank opening. You should be able to see the fuel go into the tank.