Got a strange one on the S3. After driving for 10 minutes yesterday, glanced down and noticed the temp gauge was on zero Then it rapidly shot up to 90, then back down, then back up?? I changed the stat about 2 months ago but the symptoms for that where never hittting 90 and always sitting around 70/75 so I don't believe its the stat again. Could this be the Temp sender? Scanned the car but its not showing as a fault? Ideas?