It sounds like it may have been undercharged at the factory. It's not common, but it does happen. It needs to be checked out by a competent service center.
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2010 22FB(Ret)
2013 F250 XLT
I now have a Keystone Outback, but I try to help when I can.
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Bitter Gun Owner
Bitter Clinger
Armed Infidel
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