The vacuum pump is used to check the proper operation of: the fuel supply system (for example, if the fuel pump has failed), while checking the installation, watch for air bubbles in the fuel. pressure sensors (operating range). exhaust gas recirculation valve. fuel pressure regulator. pressure modulator in automatic transmissions. brake booster etc. Kit includes: metal pump with pressure gauge with a range of (076 cm Hg) (1 to 0 bar) 2 flexible hoses, approximately 600 mm long connectors with terminals and wires set connector terminals and plugs set container 2 container lids