Yeah, but surely knowing what the actual temp of engine is would help?
The EVIC will tell you that; or if that is different from temp engine is, that will be fooling the computer/create a problem. As it would use same sensor.
If I had any temp ambiguities/something not indicating correct, the first step for me would be to see what the actual temp it should be showing is (measure with IR) and what the EVIC thinks/shows it is/do they all match up.
You could be right, could just be dodgy gauge.
But knowing what the actual temp is/whether EVIC reads that temp would pretty much confirm that sensor and CPU know correct temp, as breaks cct in half/should eliminate them.
Then move on from there.
Also, have you tried the "test gauges" function? I can't remember how to actuate it, (I tried it ages ago) but it is on here somewhere/someone will remember. By selective action (ign or throttle) you can get the gauges to sweep min to max, then step and stop in quadrants, ie all gauge test. That may not be conclusive, but if you do it when cold and when hot and gauge doesn't do what it should, may give info as well.
The more info the better? And these are checks (gauges/EVIC) that take seconds to try.