I was driving back along the OH/PA turnpike yesterday and noticed that I am getting some strange readings on the temperature guage on my '85 GL.  On the longer hills, the guage (which normally seems to run just a hair over the small white line above the low mark) would begin to show lower temps.  After a few minutes (10 or so) of climbing, the idiot light (as it seems to be appropriately titled) betgan to flash.  I immediately backed off the RPMs and the light quickly ceased.  This happened twice.

When I finally got home I noticed the faint smell of coolant around the driver-side rear of the van.  I crawled under, but couldn't find any indication of leaks.  I assume that the smell was from the hot coolant in the overflow bottle in the engine compartment.

I assume that I have a bad sensor, but, when I dug into the Bently manual (which I am still having trouble deciphering) I noticed that there seem to be several temperature sensors.  Which one controls the guage?

Brian
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