Eldorado V8-300 4.9L (1991)
Fuel Rail And Injectors
FUEL RAIL ASSEMBLY
REMOVAL:
Before removal, the fuel rail assembly may be cleaned with a spray type engine cleaner, such as AC-Delco X-30A or equivalent.
CAUTION:
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DO NOT immerse fuel rails in liquid cleaning solvents.
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When servicing the fuel rail assembly, be careful to prevent dirt or other contaminants from entering the fuel passages. Fittings should be capped
and holes should be plugged during servicing.
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Whenever the fuel system is opened for service, the O-ring seals used with related components should be replaced.
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Support the fuel rail to avoid damaging components.
1.
Disconnect the negative battery cable.
2.
Remove the air cleaner.
3.
Relieve the fuel system pressure, refer to MAINTENANCE PROCEDURES/FUEL SYSTEM PRESSURE RELIEF.
4.
Move the power steering pump.
5.
Disconnect the vacuum line from the pressure regulator and base assembly.
6.
Disconnect the accelerator cable, cruise control cable and bracket.
7.
Disconnect the electrical connectors from the TPS, ISC, CTS and MAT sensors.
8.
Remove the coolant hose to thermostat housing.
9.
Disconnect the fuel feed line from the rear fuel rail assembly. Discard the O-ring.
10.
Disconnect the fuel return line. Discard the O-ring.
11.
Disconnect the EGR vacuum lines from the EGR valve.
12.
Remove the five rail support bracket bolts.
13.
Disconnect the electrical connectors at the front and rear fuel rail assemblies.
14.
Remove the fuel rail assembly from the intake manifold.
FUEL INJECTORS
REMOVAL:
1.
Disconnect the injector electrical connector while the fuel rail is inverted.
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Push in the wire connector clip while pulling the connector body away from the injector.
2.
Remove the retainer clip from the injector. Discard the clip.
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Spread open the clip slightly and slide the clip away from the fuel rail.
3.
Remove the fuel injector assembly.
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Twist back and forth while removing.
