[Excaliber]

Mine is steady as a rock. Slowly climbs to it's 180 reading and stays there within a few degrees up or down as I drive along and encounter various loads upon the engine.

On a side note: Just TODAY I removed my sending unit from the intake manifold (427 FE) and immersed it in a metal pot of water. Which I then heated to a rapid boil with a torch. At a brisk boil the temp gauge read 108 degrees centigrade. 1 C is approximatly 1.8 degrees F. Which means my gauge is reading about 14 F on the high side! I am at sea level, a rapid boil IS 212 degrees F, 100 C.

I all ready knew this, but was reconfirming using the same test I used about a year ago, just to see if there was any change in accuracy (no change). Autometer gauges from Finish Line, they look good, but I've never been happy with the accuracy of the temp, kind of pisses me off in fact. Those gauges cost big money, that error reading is well outside what a reasonable person should have to accept as "adequate".