Ford 2003 Mustang Workshop Manual page 2957

The vehicle:
uses a returnless fuel system.
is equipped with a multiport fuel injection (MFI) system.
uses separately controlled fuel injectors (9F593) for each cylinder. The fuel injectors are
mounted to the intake manifold.
fuel injectors are supplied with pressurized fuel from the fuel pump (9350) through the fuel
injection supply manifold (9D280).
fuel injection supply manifold is controlled by the electronic fuel delivery module which is
enabled by the powertrain control module (PCM) (12A650).