I bought my car thursday and intill today I had not seen the temp gauge move past the 130 140 area... Now today it started sitting between the middle and the N in normal... is this just a bad gauge????.. I quickly changed the thermostat to try to bring it down... but it didn't work also it seems the heat comes and goes as it pleases when I have it blasting.. When I feel the hood it feels cool and the hoses seem soft and the radiator cap comes off with no harmfull consequences...