Sounds to me like your truck doesn't like it much.....and I think that we discussed it on the phone; some trucks don't respond well to it. Some go nuts with the romping, some idle normally, and unfortunately, yours dies.
It's completely up to you what you want to do with it. Since it's a tune issue, it won't be too hard to fix....just tell us what you want in its place.
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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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