Fun fact for you guys while I think of it...
All engines need some sort of Power Enrichment when under load. Ford delays this power enrichment for 60 seconds in the stock calibrations. Meaning you have to have your foot to the floor for 60 seconds straight until the engine gets the additional fuel it needs to run properly. Let off for a second and the 60 second timer resets. They do this for emission reasons.
That's bad enough, but there's another factor that even most engine tuners don't know... The Ford V10 WILL NOT go into Power Enrichment when the cruise control is being used. Ever. Yikes! The engine calibrations use Pedal Position for PE, instead of actual Throttle Position like GM does. So if the cruise is on, for many things like PE, the ECM thinks you're at closed throttle because the pedal is at 0%. Pretty stupid on Ford's part.
So the lesson is, do not use cruise control when you're in any kind of heavy load/climbing situations.
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