[quote author=Bob Jusnes link=topic=59577.msg1123437#msg1123437 date=1167332141]
Resetting the battery will revert it to the base parameters of the tune you are running. It may or may not help in your case. What will probably happen is the dealership will hopefully find a newer calibration to use on your car and reflash it. Many guys who have had that done on this site said that it seemed to clear up most of their problems, hopefully it will help with yours.
Thank you for taking the time to reply. I feel as though I have learned alot from this forum and posters like yourself. It better equips me to converse intelligently with the dealer, who has always been helpful in the past with our 2000 Focus. As I stated, our SEL V6 AWD only has 500 miles on it and is still breaking in but I sure don't want to be stuck with 13.2 mpg for city driving since that is 90 percent of our driving situation. I realize now that the AWD decision was a hasty one, but partly based on the safety and handling factor.
That being said, I still believe the 19 mpg EPA estimate (range of 16 to 22) should be obtainable with the proper computer tuning. We are not "zoom-zoom" drivers and live where the terrain is as flat as a pool table, on the Eastern Shore of Maryland. The highest "altitude" for miles around is 50 feet above sea level.
This machine, as equipped, had a MSRP of $27,105 and you can buy alot of rice burners for that price. I honestly will not keep the Fusion -- as much as we love it -- if 13.2 is the best that it is going to do under city driving conditions. I'm also one of those people who hates to spend a lot of bucks on a brand new vehicle.
Even so, I am willing to get this situation some time for improvement.
If I understand your words -- Resetting the battery will revert it to the base parameters of the tune you are running. It may or may not help in your case. What will probably happen is the dealership will hopefully find a newer calibration to use on your car and reflash it -- correctly, once the computer has been reflashed those calibrations then become the default. Is that correct? Resetting the battery takes the computer back to its most-recent flash, not some sort of factory default?
Boz, aka U R NEWS