Landcruiser 4WD L6-4.5L (1FZ-FE) (1993)
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EGR Vacuum Modulator: Testing and Inspection
INSPECTION
1. Inspect exhaust gas recirculation vacuum modulator operation.
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Disconnect the vacuum hoses from ports P, Q and R of the exhaust gas recirculation vacuum modulator.
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Block ports P and R with your finger.
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Blow air into port Q, and check that the air passes through to the air filter side freely.
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Start the engine, and maintain speed at 2,500 rpm.
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Repeat the above test. Check that there is a strong resistance to air flow.
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If operation is not as specified, replace the exhaust gas recirculation vacuum modulator.
