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Home >> Ford >> 2004 >> Excursion 5.4 L, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Introduction - CNG, Flex-Fuel & Gasoline >> Preface >> Symptom Charts Article
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Symptom Charts Article

All diagnosis begins in the SYMPTOM CHARTS article with QT: Step 1: PCM Quick Test. If the PCM Quick Test is completed and no DTCs are received, the technician may be directed to Step 2: No DTCs Present Symptom Chart Index (refer to SYMPTOM CHARTS - CNG, FLEX-FUEL & GASOLINE for details). The No DTCs Present Symptom Chart Index contains the list of symptoms addressed in this article, and will send the technician to the appropriate Step 3: No DTCs Present Symptom Chart. If no PCM DTCs are present and the vehicle symptom is not listed in the Step 2: No DTCs Present Symptom Chart Index, the technician should go the appropriate article to continue diagnosis.