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Home >> Ford >> 2004 >> Excursion 6.8 S, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Symptom Charts - CNG, Flex-Fuel & Gasoline >> Step 3: No DTC(s) Present Symptom Charts >> Chart 19

Chart 19

Fuel System Concerns:

SYSTEM/COMPONENT REFERENCE ( PINPOINT TEST - CNG, FLEX-FUEL & GASOLINE  ) unless noted 
Natural Gas Applications:
Fuel Delivery System
GO to B: Natural Gas Fuel Delivery System STEP HB28.
EVAP System GO to X: Evaporative Emission (EVAP) Monitor and System STEP HX14.
Fuel System Visual (refer to the appropriate FUEL SYSTEM article for system description)