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Figure 1.2-1: Throttle body injector (TBI)
Fuel pump/filters
Function: To filter the fuel and to produce the injection system pressure.
The fuel pump/filter units consist of the following main components:
a)Fuel filters (Figure 1.2.2 Position 3)
Function: To protect fuel pump from pollutants greater than 10 microns.
b)Fuel pump (Figure 1.2.2 Position 3)
Function: To produce the system pressure and deliver fuel to the injection valve.
Warning Only connect the fuel pump power supply through ignition switch power supply 
Fuel Filter (Figure 1.2.2 Position 2) Function: Protect the injector valves from pollutants
greater than 1 microns