4xx?
I haven't seen a PCM that doesn't have at least two numbers. Are you sure it doesn't say "45x" or something along those lines?
You might have to get ahold of Bill with all of the numbers on the board. I can't help you any more with this.
Sorry.
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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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