A flashing check engine light means ONE THING, and ONE THING ONLY: Engine misfire that has the potential to damage the catalytic converters.
Nothing else will cause the check engine light to flash on and off.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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