Aeromotive 14144 - 07-09 5.4L GT500 FUEL RAIL KIT - Manual (Page 2)

1. Once the engine has been allowed to cool, disconnect the negative battery cable and
relieve fuel system pressure, referring to the appropriate vehicle service manual for the
procedure on doing so.
2. Check for any dirt or debris around the fuel injectors. If any is evident, wash it off with
some solvent parts cleaner or wipe it off with a clean shop towel.
3. Disconnect the electrical connector at each injector, making note of the location of each.
4. Disconnect the supply fuel line from the OEM fuel rails. Place clean shop towels around
the open fuel lines to catch any gasoline that may drip out and to prevent any dirt from
entering the fuel lines.
5. Remove the throttle body and air intake tube.
6. Label and disconnect any electrical wiring, vacuum lines and throttle body components
that will interfere with the fuel rail removal and installation.
7. Remove the 4 mounting bolts that attach the fuel rail to the intake manifold.
8. Place clean shop towels around the injectors to catch any gasoline that may be spilled
during their removal. Remove the injectors from the manifold by gently pulling upward
on the fuel rail / injector assembly. Keep all injectors connected to the fuel rails. If an
injector does pull out of the fuel rail, it may spill a large mount of gasoline.
9. Carefully remove the fuel injectors from the OEM fuel rail.
10. Remove the old o-rings from the fuel injectors, inspect the injectors for any dirt or debris
and clean if needed. It is suggested that the old o-rings be replaced, contact your local
auto parts store for replacement o-rings.
11. Coat the new fuel injector o-rings with a light oil to ease installation.
12. Carefully install the new injector o-rings on the injectors.
13. Install the appropriate union fittings and o-rings in each end of the fuel rail, we
recommend Aeromotive p/n 15605 for AN-06 or Aeromotive 15607 for AN-08. In some
instances the use of a male o-ring boss 90-degree hose end, Aeromotive p/n 15665 will
ease the installation.
14. Place a thin coat of light oil in the fuel rail injector bores and in the lower intake manifold
injector bores to help prevent cutting the o-rings during installation.