I suggest while you're there get a new sending unit too, they're pretty cheap and the stock ones go bad eventually. Mine was doing weird temp things like that too, and the sender was the culprit! Good luck!
------------------
Joe!
1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing!
Click here! Or my website:
www.joe4speed.com
99 Ninja ZX-6R:10.32@135mph!
1993 Olds Eighty Eight LSS 16.40@88.8mph