The fuel filter in the 09-10s (and probably 11s) is not user serviceable (it's in the tank).
Unless you over oiled your K&N, your MAF and throttle body shouldn't need to be cleaned.
I'd suspect winter blend gas is still being sold in your area or maybe there's more alcohol content (E10).
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"Good judgement comes from experience. Experience comes from bad judgement." - Colin Powell to new batch of 2LTs (while serving as V Corps Commander)
Factory manuals here: http://www.motorcraftservice.com
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