Temp gauge issue

[Artinaudio]

Greetings all,
Ik so my 94 temp gauge is acting weird, it only shows temp after shutting truck off and once I switch ignition back on temp drops off again. I've replaced both the sensors upper and lower twice. Any help would be much appreciated.

 

[big3500]

Hey there, I will monitor this thread as I am in the same boat.