Conflicting Water temperature Readings AND Overheating quickly

[DadofThree]

I installed an autometer electronic water temp gauge in my intake. The temp display would jump up to 250 degrees while my Fitech would say under 185. I reinstalled my mechanical water temp gauge to use as a "check" and found that it conflicts with the electronic one. The mechanical water temp gauge is in line with the fitech handheld, and the laser temp reader that I purchased to check the temps.



Has anyone seen this before? NOTE: MECHANICAL IS CELSIUS and ELECTRIC IS FAHRENHEIT

Please see video - There's some sort of weird delay (sound vs picture) but you'll get the idea

https://www.youtube.com/watch?v=h1kC08QXe0g&t

Thanks,
Dave