Oldsmobile/Buick Repair: changing fuel injector, spark plug wires, coolant hoses

Question
I have a 2001 buick century V6 3.1 litre. and am looking to replace a faulty fuel injector. I am looking for this information and if any special tools are needed and if so what?

Answer
Hi

Here is procedure...... PLEASE READ AT BOTTOM FOR EXPLANATION


Remove the fuel rail.((( Relieve fuel system pressure. Refer to Fuel Pressure Relief .
Remove the upper intake manifold. Refer to Upper Intake Manifold Replacement .

[[[[[[[ Disconnect the battery ground (negative) cable.  
Disconnect the vacuum hose connection from the throttle body air inlet duct.
Disconnect the wiring harness connection from the intake air temperature (IAT) sensor in the throttle body air inlet duct.  
Remove the throttle body air inlet duct.
Drain the engine coolant from the cooling system.  
Remove the accelerator control and cruise control cables with bracket from the throttle body.  
Disconnect the wiring harness connectors from the throttle body.
•  Throttle position (TP) sensor
•  Idle air control (IAC) valve
Disconnect the (left) front spark plug wires. Refer to Spark Plug Wire Replacement in Engine Electrical.
Disconnect the wiring harness attachment clips.
•  Camshaft position (CMP) sensor wiring harness
•  Left spark plug wire harness
•  Engine wiring harness
Disconnect the thermostat bypass pipe coolant hoses from the throttle body.
Remove the ignition coil bracket with the coils, the purge solenoid and the vacuum canister solenoid.
Disconnect the vacuum hose at the manifold air pressure (MAP) sensor and upper intake manifold.
Remove the manifold air pressure (MAP) sensor and the bracket.
Disconnect the emission control vacuum harness.
Disconnect the vacuum hose connections from the upper intake manifold.
•  Vacuum booster hose
•  Automatic transaxle vacuum modulator hose
•  Heater and air conditioning vacuum source hose
•  Fuel pressure regulator
Remove the generator brace.
Remove the exhaust gas recirculation (EGR) valve.
Remove the right upper intake manifold bolts and studs.
Remove the left upper intake manifold bolts.
Remove the upper intake manifold.
Remove the upper intake manifold gasket.]]]]]]]]]]

Remove the engine compartment fuel pipe retainer bolt.
Disconnect the engine fuel feed pipe at fuel rail.
Disconnect the engine fuel return pipe at the fuel pressure regulator.
Remove the fuel feed pipe and fuel return pipe O-rings and discard.
Disconnect the main injector harness electrical connector.
Pull up the lock release (2) of the fuel injector connector.
Depress the lock tab (1) on the fuel injector connector.
Remove the fuel injection harness from the fuel rail.
Disconnect the coolant temperature sensor electrical connector.
Remove the fuel rail retaining bolts.
Remove the fuel rail assembly.
Remove the injector O-ring seal from spray tip end of each injector. Discard seals. ))))))

Remove the fuel injector retaining clip (1).
Remove the fuel injector (3).
Remove the fuel injector upper O-ring (2).
Remove the fuel injector lower O-ring (4).


Substeps are located between the ((((fuel rail removal)))) and [[[[upper intake plenum removal]]]]]

I Hope this helps.
Good Luck
Pawl