4 Runner 2WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1992)
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EGR Valve: Testing and Inspection
1.
Apply vacuum directly to EGR valve with engine idling.
2.
Ensure that engine runs rough or dies.
3.
If EGR valve diaphragm holds vacuum and pintle actuates but has no effect on idling engine, remove EGR valve and inspect passages for
blockage.
4.
If EGR valve diaphragm does not hold vacuum, replace EGR valve.
