I have a 2004 Explorer Limited (40K miles) with the V8 and AWD.
Yesterday while driving my MPG readout in my message center started to
change. It was reading a constant 17.2 mpg (I actually got 18.3
yesterday) and then in the matter of five minutes it went up to 53 or
so. Everytime I pressed the reset button it would jump all over and
for a while it seemed like it was responding to throttle position
almost like it was a vacuum gage. I know I didn't discover a magical
fuel economy fix. Is it screwed up? Any idea what is going on? Is
there some secret function to this thing?