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My guess would be that the master switch is loosing its mind and not allowing power to get to the correct areas when needed. I had one in my explorer do all kinds of weird things when it failed
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
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