GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Generic 🢒 2003 🢒 Unit Repair 🢒 Engine 🢒 Engine Controls - 3.6L (LY7) 🢒 Dieseling, Run-On

Inspections

Action

DEFINITION: The engine continues to run after the key is turned OFF, but runs very rough. If the engine runs smooth, inspect the ignition switch and the ignition switch adjustment.

Preliminary
    • Refer to Important Preliminary Checks Before Starting in Symptoms - Engine Controls .
    • Search for bulletins.
    • Verify that the engine control module (ECM) and ECM bracket fasteners are at the correct torque.
    • Inspect the engine control system grounds for being clean, tight, and in the correct locations. Refer to Power and Grounding Component Views in Wiring Systems and Engine Controls Schematics . Ensure the resistance between the ECM housing and the battery negative cable is less than 0.5 ohms.

Fuel System

Test the fuel system for the following conditions:

    • High fuel system pressure
    • Leaking fuel injectors
        For more information, refer to Fuel System Diagnosis .