Chapter 4 Fuel and exhaust systems
4-43
23.13
An exploded view of the fuel rail assembly
7
(3.OL engine)
3
I
,2
3
4
s
6
7
8
9
10
11
12
13
Air intake plenum assembly
Fuel high-pressure hose
Fuel return hose
Vacuum hose
Fuel pressure regulator
O-rfng
Fuel injector wiring harness
electrical connector
Fuel rail assembly
Fuel injector
O-ring
Grommet
Insulators
insulator
17 Remove the fuel rail mounting bolts and remove the fuel rail and the
insulators. Pull gently up on the rail, using a rocking motion. Discard the
insulators.
18 Installation is the reverse of removal. Be sure to use new insulators for
the fuel rail (see illustration) and fuel injectors. Also, use a new O-ring for
the fuel high-pressure hose connection and coat the O-ring with gasoline
before installation. Tighten the fuel high-pressure hose attaching bolts to
the torque listed in this Chapter’s Specifications.
24 Fuel injector(s) -check, removal and installation
Warning:
Gasoline is extremely flammable, so take extra precautions
when you work on any part of the fuel system. Don’t smoke or allow open
flames or bare light bulbs near the work area, and don’t work in a garage
where a naturalgas-type appliance (such as a water heater or clothes dry-
er) with a pilot light is present. If you spill any fuel on your skin, rinse it off
immediately with soap and water. When you perform any kind of work on
the fuel system, wear safety glasses and have a Class 6 type fire extin-
guisher on hand.
Check
Refer to illustration 24.2
1 With the engine running or cranking, listen to the sound from each in-
jector with an automotive stethoscope and verify the injectors are all click-
ing the same. If you don’t have a stethoscope, place the tip of a
23.18 After installing the fuel rail and mounting bolts,
verify that all four insulators are properly seated before
tightening the bolts (3.OL engine)
screwdriver against the injectors and press your ear against the handle of
the screwdriver. Also feel the operation of each injector with your finger. It
should sound/feel smooth and uniform and its sound/feel should rise and
fall with engine RPM. If an injector isn’t operating, orsounds/feels erratic,
check the injector connector and the wire harness connector. If the con-
nectors are snug, check for voltage to the injector, using a special injector
harness test light (available at most auto parts stores).
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