Why is my 5.4 in my F250 lacking power?

Asked by May 31, 2017 at 04:08 PM about the 1999 Ford F-250 Super Duty XLT 4WD Crew Cab SB

Question type: Maintenance & Repair

Engine runs great, smooth ride, diagnostic tests produce no codes at all.  At
highway speeds trying to pull a hill or pass someone it has NO "get up and go"
at all.  RPM's jump up to 4 - 5K in passing gear but no power to pass and very
slow.  Does not miss or sputter, just no power.  Any suggestions?

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