Operation CHARM
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Ford
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1990
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F 150 2WD Pickup L6-300 4.9L
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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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N18 - N20
N18 - N20
Pinpoint Test N18 & N20 - Ignition Diagnostic Monitor (IDM):
