Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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EGR Valve: Description and Operation

PURPOSE/OPERATION
Control amount of exhaust gas recirculation. The electronic control module signals the EGR solenoid to switch from ported vacuum to atmospheric pressure, thereby opening and closing the EGR valve. The EGR valve opens in response to engine driving conditions and provides a portion of exhaust gas to the cylinders through the intake manifold. EGR valve vacuum signal is picked up from a port upstream from the throttle valve.