Altima V6-3.5L (VQ35) (2003)
VACUUM CUT VALVE
Check vacuum cut valve as follows:
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Plug port C and D with fingers.
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Apply vacuum to port A and check that there is no suction from port B.
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Apply vacuum to port B and check that there is suction from port A.
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Blow air in port B and check that there is a resistance to flow out of port A.
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Open port C and D.
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Blow air in port A check that air flows freely out of port C.
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Blow air in port B check that air flows freely out of port D.