Install at the same time. Your chip will be taking a trip with UPS today (it's sitting by the door waiting right now). The truck will start and run, but it won't run well.
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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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