Century V6-173 2.8L VIN W FI (1987)
Direct Ignition Module: Service and Repair
REMOVE
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Negative battery cable.
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Direct Ignition System (DIS) electrical connectors.
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Spark plug wires. (Note proper relationship of wires to coils).
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"DIS" assembly to block bolts (3).
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"DIS" assembly from engine.
INSTALL
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"DIS" assembly to engine.
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"DIS" assembly to block bolts (3).
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Torque to 25 Nm (19 lb ft).
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Spark plug wires to proper coils.
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"DIS" electrical connectors.
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Negative battery cable.
IDLE LEARN PROCEDURE
Before starting engine, follow the "Idle Learn Procedure" as follows:
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Install Tech 1 "Scan" tool.
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Ignition "ON," engine "OFF."
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Select "IAC SYSTEM," then "IDLE LEARN" in the "MISC TEST" mode.
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Proceed with idle learn as directed.
This procedure allows the Electronic Control Module (ECM) memory to be updated with the correct Idle Air Control (IAC) valve pintle position
for the vehicle and provides for a stable idle speed.
