I just recently bought a 2002 explorer sport with about 50K on it.
Drove it for a week with no problems.  First I noticed the gas gauge
one day go way down below "E" and the check gauge light appeared.  I
kept an eye on it, and eventually it climbed back to half a tank.  Im
think, Ok, Maybe a bad fuel sending unit.  Then the other day, the
temp gauge went all the way up past "H" by about a 1/4 inch, the fuel
gauge did the same thing as last time, and the battery gauge went
below "L" by a 1/4 inch.  I pulled over, the engine was barely warmed
up, so I checked the radiator cap to make sure, not even hot yet. I
get back in, the check gauge light flashed and all gauges went back to
normal.  Can anyone shed some light on this for me?

Thanks,

Nate