Operation CHARM
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Eagle
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1982
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Eagle L6-258 4.2L
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Repair and Diagnosis
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Powertrain Management
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Emission Control Systems
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Exhaust Gas Recirculation
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EGR Temperature Sensor
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Description and Operation
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Low Temperature Vacuum Signal
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Low Temperature Vacuum Signal
OPERATION
The modulator is open when ambient temperatures are below 60° F. This causes a weakened vacuum signal to the EGR valve and a resultant decrease in the amount of exhaust gas being recirculated.