OK, what do you mean 'reset everything' ??
Does this mean you remove all modifications (wires/intake/etc) and went back to stock??
I really would not expect the wires to take away MPG. I experienced slight gains.
This is why I asked if you did several mods at one time.
If you did, then I would not be surprised.
My K&N drop-in did cause my MPG to go down in my 05 Sedan. This was my wife's car, so I feel confident about the drop.
Because you know, some driver's rt foot gets heavier after adding mods!!
