For this research an extension of the LIF technique that the LIEF(Laser Induced Exciplex Fluorescence) technique has been used LIEF technique is the unique method to allows the visualization of fuel vapor phase and liquid phase individually by capturing each signals of them. In this work, performed that the basic procedure for advanced LIEF technique using TEA and benzene as dopants and high power KrF excimer laser to excite the dopants. Iso-octane is used as the fuel because it does not absorb light at the laser wavelength. The boiling point of benzene and TEA are 81`C and 89`C, respectively, in comparison to 99℃ for iso-octane. It is observed that the behavior and distribution of high pressed fuel ir~jection from various test condition. The injection pressure is set as 3㎫. and 5㎫. And the ambient pressure of test chamber is atmospheric pressure and 1㎫, the ambient temperature of chamber is room temperature, 300℃ and 500℃ to imitate the condition of GDI engine cylinder.