Vacuum Regulator Valve

Ensure vacuum pressure of 1.5-2.7 in. Hg is obtained from "Z" port when vacuum of 14.9 in. Hg is applied to "S" port. See Fig 6 .

Fig 1: Cutaway View of EGR Valve

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Fig 2: Isuzu EGR System (California)

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Fig 3: Intake Throttle Valve

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Fig 4: Thermal Vacuum Valve

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Fig 5: Isuzu EGR System (Federal)

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Fig 6: Vacuum Regulator Valve

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