The best way to get your mileage back is to do it all in one shot. Even when the Diablo is installed in the truck with the VXCF9H7 strategy, the ECM is still operating with a crappy base strategy.
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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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