LS 400 V8-4.0L (1UZ-FE) (1990)
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EGR Valve: Testing and Inspection
EGR Modulator Inspection
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Start engine and idle.
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Remove vacuum hose from EGR and connect manifold vacuum to valve.
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Engine should idle rough or die.
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Replace valve if desired results are not achieved.
See Also: Refer to Exhaust Gas Recirculation System testing.
See: Testing and Inspection
