Bobby,
We've already got your injection pressure lowered about 700 PSI in the SS program from where your 120R tune is. This usually dumps a lot of poorly-atomized fuel in the cylinder with a lot more injector on-time. There just isn't enough fuel there.
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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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