Daewoo Nubira User Manual page 585

1F – 382IENGINE CONTROLS
FUEL RAIL AND INJECTORS
Removal Procedure
CAUTION : The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pressure
before disconnecting the fuel lines.
1. Relieve the fuel system pressure. Refer to "Fuel
System Pressure Relief"in this section.
2. Disconnect the negative battery cable.
3. Disconnect the intake air temperature (IAT) sensor
connector.
4. Disconnect the breather hose from the valve cover.
5. Remove the air intake tube and resonator.
6. Disconnect the positive crankcase ventilation (PCV)
hose from the valve cover.
7. Disconnect the throttle cables from the throttle body
and the bracket.
8. Remove the fuel pressure regulator. Refer to " Fuel
Pressure Regulator " in this section.
9. Disconnect the fuel return line at the fuel rail.
10. Disconnect the fuel inlet line at the fuel rail.
11. Remove the fuel rail retaining bolts.
Notice : Before removal, the fuel rail assembly may be
cleaned with a spray–type cleaner, following package in-
structions. Do not immerse the fuel rails in liquid cleaning
solvent. Use care in removing the fuel rail assembly to pre-
vent damage to the electrical connectors and the injector
spray tips. Prevent dirt and other contaminants from enter-
ing open lines and passages. Fittings should be capped
and holes plugged during service.
Important : If an injector becomes separated from the rail
and remains in the cylinder head, replace the injector O–
ring seals and the retaining clip.
12. Remove the fuel rail with the fuel injector channel
cover and the injectors attached.
13. Disconnect the fuel injector channel cover connec-
tors.
DAEWOO V–121 BL4