When mechanical gauges do that sort of thing, its often a bad ground.
Worth a look.
>I just noticed today that the digital display(87 Coupe GT) for the water
>temp moves more
>like a tachometer than a temp reading. I think that the water temp is OK and
>the gauge is acting up. The more I press the accelerator the higher the
>reading goes. I know most people hate the digital dash because of weird quirks
>like this but I'd like to keep the car stock if possible. Has anyone heard of
>a fix for this weird problem?
>Mike Des Chenes
>87 Coupe GT
San Jose, California
'87 560 SL