Century V6-173 2.8L VIN W FI (1987)
Injector Installation
REMOVE
^
Disconnect negative battery terminal.
^
Relieve fuel system pressure. (Refer to Fuel Delivery / Service and Repair.
See: Service and Repair
^
Intake manifold plenum.
NOTICE: Use care in removing injectors to prevent damage to the electrical connector pins on the injector, and the nozzle. The fuel injector is
serviced as a complete assembly only. Since it is an electrical component, do not be immerse it in cleaner.
^
Fuel rail assembly.
DISASSEMBLE
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Injector retainer clip.
^
Discard retainer clip.
^
MPFI injector assembly.
^
Injector O-Ring seals from both ends of injector and discard.
CAUTION: Each injector is calibrated for a specific flow rate. When replacing fuel injectors, order replacements with the identical part number
as the old injectors.
ASSEMBLE
^
Lubricate new injector O-Ring seals with engine oil, and install on injector assembly.
^
New injector retainer clips on injector assembly.
^
Position open end of clip facing injector electrical connector.
^
MPFI injector assembly into fuel rail injector socket with electrical connectors facing outward.
^
Push in far enough to engage retainer clip with machined slots on rail socket.
INSTALL
Fuel rail assembly. Refer to Fuel Rail.
Inspect
^
Temporarily connect negative battery terminal.
^
Turn ignition switch to the "ON" position for two seconds, then turn to the "OFF" position for ten seconds. Again turn to the "ON" position
and check for fuel leaks.
^
Disconnect negative battery terminal.
^
Intake manifold plenum.
^
Tighten fuel filler cap.
^
Negative battery terminal.
IDLE LEARN PROCEDURE
Any time the battery is disconnected, the programmed position of the Idle Air Control (IAC) valve pintle is lost, and replaced with a "default"
value. To return the IAC valve pintle to the correct position, perform the following procedure:
^
Restore battery power.
^
Connect Tech I "Scan" tool.
^
Select "IAC SYSTEM," then select "IDLE LEARN" in the "MISC TEST" mode.
^
Proceed with idle learn as directed.
This procedure allows the Electronic Control Module (ECM) memory to be updated with the correct IAC valve pintle position, for the vehicle,
and provide a stable idle speed.
