Operation CHARM
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Ford
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1986
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E 150 Van L6-300 4.9L
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Engine
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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 17 Through 19
Steps 17 Through 19
Spark Timing, Steps 17 thru 19: