It will start? Do you mean it won't start? What are you trying to do? The fuel pump will only run for two seconds when you turn on the ignition switch, and again when the engine is rotating, (cranking or running).
If you're thinking it won't start until the fuel gets up to the engine, just turn the ignition switch on for a few seconds, then off for at least five seconds, then on again. It won't take long to get the fuel to the engine.