The fuel delivery pipe, commonly referred to as a fuel rail, is designed to hold the injector in place on the intake manifold. Mounted to the fuel delivery pipe are the pulsation damper (when used) and the fuel pressure regulator. The fuel delivery pipe acts as a reservoir for fuel which is held under pressure prior to delivery by the fuel injector.
Safety tips: When a pressurized fuel line is opened, it poses a fire hazard. Therefore it is important to relieve fuel system pressure prior to opening the line at the filter. It is also important to disconnect the battery negative :qable prior to opening fuel lines due to the proximity of some filters to the +B terminal of the starter.
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