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Engine Controls - Tests W/O Codes 3.0L
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Symptoms
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Surging
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Engine Controls - Tests W/O Codes 3.0L: Symptoms: Surging
Check Heated Oxygen Sensor (HO2S). See
SYSTEM/COMPONENT TESTS
article.
Check EGR system operation. See
SYSTEM/COMPONENT TESTS
article.
Replace ECM with known good unit.