T100 Pickup 4WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1993)
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EGR Valve: Testing and Inspection
INSPECTION
1. Check seating of the Exhaust Gas Recirculation (EGR) Valve.
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Start the engine and check that the engine starts and runs at idle.
2. Check EGR Valve operation.
Testing Exhaust Gas Recirculation System Operation.
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Apply vacuum directly to the EGR Valve with the engine idling.
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Check that the engine runs rough or dies.
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Reconnect the vacuum hoses to the proper locations.
If no problem is found with this inspection, the EGR Valve is okay; otherwise inspect EGR Valve and passages.
3. Visual inspection
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Remove EGR Valve.
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Check the Valve for sticking and heavy carbon deposits.
If a problem is found, repair as needed.
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Install EGR Valve with new gasket