Operation CHARM
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Ford
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1984
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F 350 2WD Pickup L6-300 4.9L
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Repair and Diagnosis
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Maintenance
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Tune-up and Engine Performance Checks
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Ignition Timing
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Testing and Inspection
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Non-TFI IV
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Steps 12 Through 14
Steps 12 Through 14
Spark Timing, Steps 12 thru 14: