1. A sealing device for forming an interface between a source of pressurized leak detection vapor and the air induction hose of an air induction system of an internal combustion engine, the device comprising a base portion having a valve for receiving the pressurized leak detection vapor and transferring the vapor to said air induction hose, the base portion further defining a periphery for matingly engaging with the distal-most end of the air induction hose of said air induction system, said periphery being designed and configured to conform and interconnect with the distal-most end of said air induction hose.