Jumpy temperature guage
The temp. guage on my SD is erratic sometimes. It will jump around while I'm driving, or sometimes at idle as well. Usually jumps up and down from around the 100 degrees F mark to 180 or so, quite spastically and for no apparent reason, and then levels out to the correct reading. It seems completely unpredictable...I cannot find any particular combination of circumstances that causes it.
Any ideas?...Bab sensor, bad guage, shorted wire?