Temperature guage Options

[Montreal914]

Hello everyone, after being on the 914 club for almost a year, I finally decided to join the 914 world. I don't know what the story is but there has to be something in common here, other than the main topic of course... (IMG:style_emoticons/default/idea.gif)

Now to the main subject. I was driving on the highway at about 70-75mph for about a half hour yesterday and this is what my temperature gauge was showing. The outside temperature was about 80-85 SoCal.
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As a matter of fact, the guage takes the longest time to get up. So, I guess there is only two things that can be wrong, the guage or the sensor in the taco plate. Is there a simple way to verify them? Is there some measurement that I can do with a standard voltmeter?

Thank you

[underthetire]

Well, yes, you can do an ohm reading on the sensor, but why is your volt gauge showing 10 volts? I know mine does if I have the lights on and step on the brakes without the car running, but does yours read there all the time? And it should read slowly, oil takes a while to warm up. Do you have an external cooler on the car?

[Montreal914]

Well, yes, you can do an ohm reading on the sensor, but why is your volt gauge showing 10 volts? I know mine does if I have the lights on and step on the brakes without the car running, but does yours read there all the time? And it should read slowly, oil takes a while to warm up. Do you have an external cooler on the car?

OK, if I do an ohm reading, what am I suppose to be expecting for a certain position on the gauge and what should be the needle position at normal operating temperature (80 -85F outside temp).
I have a stock 2.0 FI, no mods except Bursch exhaust.
The volt gauge is sort of random. It does move with flasher (normal) but I don't think the ground is proper. BTW, isn't there a better way of wiring the voltmeter guage to get an accurate reading (flasher or no)?
Thanks