Vortech Alpha H3 Hummer - 2008 - Manual (Page 11)

P/N: 4GN020-015
©2008 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
20OCT08 v2.0 08HummrH3(4GNv1.0)
5
4. FUEL INJECTOR REPLACEMENT
A. Relieve the fuel system pressure.
B. Disconnect the eight fuel injector wiring clips
and retainers from the injectors.
C. Remove the four 8mm bolts securing the fuel
rails to the intake manifold. Lift up on the rails
evenly, removing all eight injectors. Separate
and set aside the factory injectors as they will
not be re-used.
D. Using a small amount of clean motor oil,
lightly lubricate the O-rings on both ends of
the supplied fuel injectors.
E. Install the new fuel injectors into the fuel rails
and secure using the factory retaining clips.
F. Carefully lower the fuel rail-injector assembly
down onto the intake manifold. Check to see
that each injector has been seated properly
into the manifold.
G. Secure the fuel rail assembly using the origi-
nal hardware and attach the wiring clips to
the injector terminals.
NOTE: Caution should be used when working on
the fuel system. Fuel may be under high
pressure. Fuel injector replacement should
be performed in a well ventilated area free
of any possible ignition source. It is recom-
mended that you have a fire extinguisher
nearby.
NOTE: The injector plug connections must
face outwards.