99 expedition

[alpo]

Does anyone know why I'm getting 8-9 miles per gallon on my expedition??
I've replaced the coil packs, the alternator, the spark plugs, the spark plug wires, the fuel filter, the air filter, the MAP sensor, I've cleaned the throttle body, and still I have fuel issues????
Can someone PLEASE help
I also need to replace the body bushings and I can't seem to find them anywhere for a regular 2 wheel drive????

 

[stamp11127]

Can be any of multiple causes.
Driving style, trans not shifting into od, worn engine, dragging brakes and so on.

 

[Canadian Expy]

Your rolling on 38's like me ??? cause 8-9MPG is the norm!!!

Also if you replaced spark plug wires you may have a problem , cause there shouldn't be any.
How miles on it? and how heavy is your right foot?
What quality of parts did you use?