Operation CHARM
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Mercury
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1991
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Cougar/XR7 V6-232 3.8L
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Repair and Diagnosis
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Powertrain Management
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Testing and Inspection
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Pinpoint Tests
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DN - EGR Valve Position Sensor/EGR Vacuum Regulator Solenoid
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DN21 - Check EVP Sensor and EGR Valve Operation
DN21 - Check EVP Sensor and EGR Valve Operation
Pinpoint Test DN21:
