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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NA - TFI Ignition Diagnostic Monitor
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NA4 - Check IDM Circuit Continuity: TFI Module to Ignition Coil
NA4 - Check IDM Circuit Continuity: TFI Module to Ignition Coil
Pinpoint Test NA4:
