I have a 07 expedition Limited with 150k+ miles on it. When I purchased the expedition it had very low MPG around 9. I had the lean fuel codes and the cause was a fuel pump that was going out. Now that I have the new pump installed I am getting around 14 MPG and the response of the engine is poor. I read that the advertised MPG was around 19 for this model and year. I am looking for recommendations on anything that may need to have maintenance to help raise the MPG. I am not looking to get 19 but hopefully a little better than I am at. The diesel F350 I had almost got better MPG than this.
- I do not know when the Spark plugs were changed last so I plan on starting there.
- I have also thought that the injectors may need to be changed.