Lets say after the trigger on the vehicle is pressed there is a delay (>3s) before the vehicle begins moving in order to zero sensors. Would this delay be counted towards the target time? Would this be counted as a stall or not a stall since the v...

Per rule 8.j, the run time starts when the team actuates the vehicle. The run time would include any time between the actuation and the vehicle moving. A delay at the start of any length is not one of the failed run conditions listed in rule 8.n. Stalling is not part of this event's rules.