very low gas milage on 5.4 triton engine

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01-10-2014 | 01:14 PM

bernieb

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Junior Member

Joined: Aug 2006

Posts: 11

very low gas milage on 5.4 triton engine

Getting 5.5 miles per gal. on this 2002 ford expedition, and it runs great, no missing. Any suggestions where to start looking......thanks

01-10-2014 | 06:21 PM

hanky

Senior Member

Joined: Jun 2010

Posts: 15,301

I would pull a spark plug or two and see what they tell me. If it is really burning all that fuel the plugs should be pretty black.
What kind of maintenance has been done to the vehicle ?

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