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Mercury Truck
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2004
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Mountaineer AWD V6-4.0L VIN E
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Repair and Diagnosis
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Powertrain Management
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Emission Control Systems
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Evaporative Emissions System
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Testing and Inspection
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Pinpoint Tests
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Test D
Test D
PINPOINT TEST D: HISS WHEN OPENING FUEL CAP
Test D1-D2:
Test D3-D5:
Test D6:
Possible Causes
-
A hissing sound heard when opening the
fuel filler cap
can be caused by:
-
Blocked or restricted EVAP system components.