2011 f150 5.0 engine , seems to not have the power it use to. i give it gas and it souds like a roar or a moan , kinda hesitant then finally goes . acts like its not getting enough gas or air. anyone experience this issue. probably not explaining it right but its the best I can do . every once in a while , it runs really well. but not very often. Has 115,000 miles. new spark plugs at 110,000. spark plugs didnt help at all. not missing just seems sluggish.

 

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