so i found a leak by TB hose.apparently hose slipped off hard line and was on tip of hardline.went to the track made 5 passes.on the drive home my temps dropped to like 140deg.both on gauge and logger.i thought it might of been low on coolant so maybe not enough coolant reaching sensor.coolant was fine.when i got home it was low.i added some today and let car warm up and it was at normal temps.i rev engine a few times and coolant is coming out of overflow tank.car never over heated.no coolant in oil no chocolate milk on oil fill cap.maybe i added too much?blown head gasket?maybe coolant caused air pockets?