Hey guys. Can someone help me out here? My stock temp. gauge keeps going up and down very quick. I know temp. doesn't change that fast in my car. I almost think my car is always overheating, but I want to make sure it is not my stock gauge.

1. Where is the sensor that reads to my gauge cluster
2. Part number?
3. How do I change that out my self.

Thanks everyone for your input.

This is on a boosted car BTW.