So I'm having a bit of an odd issue in my opinion. It doesn't matter whether I start my car and let it run for 20 minutes before I leave or just start it up and leave. It takes about 8 miles of driving before the engine temperature comes up. Then, when I turn my heat on the temperature almost immediately drops back down to cold before slowly Rising back to normal. Then the oddest part... shutting the engine off long enough to fuel causes it to go back to cold as well. I would love to say it's just a sensor issue but when the temperature is reading cold I have no heat so it has to be the coolant temperature. What is happening here? Bad thermostat?

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