Ford 2003 Mustang Workshop Manual page 1931

Disconnect the connector.
Disconnect the vacuum hose.
8. NOTE: The right side is shown. The left side is similar.
Remove the four supply manifold bolts and remove the fuel supply manifold with the injectors.
9. NOTE: When the battery (10655) is disconnect and reconnected, some abnormal drive
symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to
be driven 16 km (10 mi) or more to relearn the strategy.
To install, reverse the removal procedure.