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8. PCM NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal Were there any problems found? Yes >> Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9. Visual and Physical Inspection Turn the ignition off. Remove the Spark Plug. NOTE: Vehicles that are equipped with the 5.7L or 6.1L engines must have both spark plugs (per cylinder) − Cracks − Carbon Tracking − Foreign Material − Gap size out of specifications − Loose or broken electrode NOTE: Lightly tap the bottom of the spark plug on a solid surface. The electrode in the spark plug should Were any of the above conditions present? Yes >> Replace the Spark Plug. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Refer to the INTERMITTENT CONDITION symptom in the Driveability category. 9 - 884 ENGINE ELECTRICAL DIAGNOSTICS LX |