Just raise the fuel pressure 10 psi and the computer will remove that extra fuel until it hits the rich side of the normal range. It takes time for that to happen, though. You need to drive for 50 or so miles. You can raise or lower your fuel pressure and get immediate changes in the air/fuel ratio, but those changes will eventually be erased by the adaptive strategy. Just keep that in mind if you're tuning on a dyno.
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