Operation CHARM
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Ford
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1994
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Aerostar 2WD V6-245 4.0L
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Repair and Diagnosis
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Powertrain Management
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Tune-up and Engine Performance Checks
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Ignition Timing
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Adjustments
Ignition Timing: Adjustments
BASE TIMING
Base
ignition timing
is preset at 10° +/- 2° BTDC from the factory and is not adjustable.