Ford 2003 Mustang Workshop Manual page 1991

SECTION 303-04D: Fuel Charging and Controls — Mach I 4.6L (4V)
REMOVAL AND INSTALLATION
Fuel Injectors
Removal
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when
working on or near any fuel related components. Highly flammable mixtures are always present
and can ignite. Failure to follow these instructions can result in personal injury.
WARNING: Fuel in the fuel system remains under high pressure even when the engine is
not running. Before working on or disconnecting any of the fuel lines or fuel system
components, the fuel system pressure must be relieved. Failure to follow these instructions
can result in personal injury.
1. Remove the supply manifold. For additional information, refer to
2. Remove the eight fuel injectors from the supply manifold.
Installation
CAUTION: The retaining clip must be in the upper groove on the injector or the injector
can become loose.
1. NOTE: Inspect the two O-rings from each fuel injector. Install new O-rings as needed.
NOTE: Lubricate the new O-rings with clean engine oil.
To install, reverse the removal procedure.
2003 Mustang Workshop Manual
Supply Manifold in this section.