FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
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Car repair manuals for everyone.
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Mercury
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1986
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Cougar/XR7 V6-232 3.8L
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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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Bowl Vent Valve
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Testing and Inspection
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Carburetor Fuel Bowl Thermal Vent Valve
Carburetor Fuel Bowl Thermal Vent Valve
At 90°F and below, the vent valve is fully closed and at 120°F and above, the vent valve is fully open.