So today I did my exaugst manifold and everything whent off with out a hitch (thank God). But when I started my Jeep and looked at the temp gauge to see if it was warmed up it hadent moved from 100°F yet but my oil pressure was normal so I drove it arround. A good solid 20min whent by still not off 100. I have everything plugged in to its respective spots and it still isent moveing does anyone know what could be causeing this to happen? Could my temp sensor have whent bad or what? If anyone has any idea please help me!