My expedition is a 5.4 two wheel drive eddie bauer the problem i "m having with it is that it started to waste more gas now. I get only ten miles to the gallon and before i would get about twelve gallons to the mile. I did the tune up but it did not help at all.

Check tire pressures, change air filter, fuel filter. check to see if it is leaving a "code" and fix if it has one.
Hope this helps.

The tune-up is a Fred Flintstone term,
meaning you got spark plugs or payed
for them and got nothing

You need new spark plugs
You need 2 new front O2 Sensors, if you
have 100,000 miles on them
You need the MAF Sensor Cleaned
A Clean Air filter
Correct fuel pressure
A properly working TPS Sensor
(throttle position sensor)
And other items.

See if you have all that done, and get back
I will evaluate your issues.

Do you have check lights on the dash
If so give us the codees