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Okay, just didn't understand that comment.
So, we finished #253 after deactivating 1 cylinder, which was done with no change to pumping loss per cycle, no change to fuel injected per cycle, but with an AFR problem.
To rectify the AFR problem and get back to stoichiometric, manifold vacuum must be decreased to increase the mass of air intake in each cylinder.
DCD is now in the same place we were in #243 with lean-burn and the rest of the argument follows. EDIT: to clarify, no change in the number of cylinders experiencing pumping loss, just a change in the manifold vacuum.
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