Yukon Gal-
these are fairly common symptons... but lots of possible problems.
First place, keep an eye on your gas milage.

1) oxygen sensor. Unplug it and see how thing work. If it works pretty
good w/o it then that could be the problem.  ABout 30$ to replace yourself
2) fuel pressure regulator: you could be running rich. About 75$ to
replace
3) temp2: computer could think you are running cold adn therefore give in
more fuel. About 40$ to fix.

All of these things are easy to fix and fairly easy to diagnose with the
help of the bentley manual or The List.

cheers
Matthew
Matthew Pollard          "Racing with the wind and flirting with death
Dept. Of Chemistry        So have a cup of coffee and catch your breath"
University of Idaho
www.uidaho.edu/~poll7356