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Home >> Ford >> 2003 >> Excursion 7.3 F, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing - 7.3L Diesel >> Engine Performance Diagnostic Procedures >> Test 2: Sufficient Clean Fuel >> Possible Causes
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Possible Causes

Cloudy fuel indicates that fuel may not be a suitable grade for cold temperatures; excessive water or contaminants may indicate that tank and fuel system may need to be flushed and cleaned.