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1986
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Taurus L4-153 2.5L HSC
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Repair and Diagnosis
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Powertrain Management
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Emission Control Systems
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Air Injection
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Vacuum Check Valve
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Testing and Inspection
Vacuum Check Valve: Testing and Inspection
Apply 54 kPa (16 in. Hg.) vacuum to "check" side of valve and trap. If vacuum remains above 50.6 kPa (15 in. Hg.) for 10 seconds, the valve is acceptable.