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EGR Operation

Exhaust gas recirculation is controlled by the ECCS. A signal is sent to the vacuum control modulator, providing a regulated vacuum supply to open the EGR valve. EGR operation is affected by cylinder head temperature, throttle valve position and ignition switch position. Recirculation takes place when the engine is operated above idle with cylinder head temperatures between 135-239° F (57-115° C).

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