assuming the dispenser isn't defective, filters clogged, or some other maintenance issues... once the pump is authorized, turn on the pump either by selecting grade or lifting the hook on older styles and wait for the head to fill, approx. 10 seconds or sometimes on vst systems you can hear it when there's full head pressure the pump changes tone.. then open the nozzle.. opening the nozzle before the head above the pump is full of fuel all the way to the grade selector and check valves may slow down the performance of the pump..
I am an icc licensed ca ust designated operator but I work in closed fleet not retail so there may be differences I am not aware of..
after about a dozen pages of all the regulations, my eyes cross and smoke rises out of my ears
https://www.waterboards.ca.gov/water....html#operator
https://www.iccsafe.org/wp-content/u...uc_content.pdf