Operation CHARM
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1989
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Mustang V8-302 5.0L HO
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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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N - Ignition Diagnostic Monitor (IDM)
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N4 - N5
N4 - N5
Pinpoint Test N4 & N5 - Ignition Diagnostic Monitor (IDM):