Leakage Test
WARNING: This page is about a different car, the 1984 Volkswagen Rabbit, 1984 Volkswagen Quantum, and 1984 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
With nozzle connected to gauge, press pump lever down slowly and hold pressure at about 1595 psi (112 kg/cm2 ) for 10 seconds. No fuel should leak from nozzle tip.