Camry Wagon V6-180.5 2959cc 3.0L DOHC (3VZ-FE) (1993)
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EGR Valve: Description and Operation
PURPOSE
The EGR valve is a vacuum operated. When the valve opens, a passage from the exhaust manifold to the intake manifold is opened. Exhaust gases
are drawn into the combustion chamber which dilutes the air/fuel charge. The reduced fuel charge results in lower chamber temperatures and
reduced NOx emissions.
OPERATION
The EGR valve is controlled by the vacuum modulator and the vacuum switching valve.
