either my radiator or water temp sensor or water temp guage is acting up. it doesn't really matter if it's a hot day or a cool night, it acts up ramdomly. i moved my radiator a bit temporarily to put the ac back in my car, and it hasn't acted the same since. when at a stop light or driving, the guage reads that the water temp is rising very quickly; almost scary quickly. itll go up to 3/4 from half, and then when i start driving again it'll jump back down to normal (half). i flushed out the whole system last week, and the prob didn't happen again till tonight. the same thing happened...i was driving the car a little hard, hitting max boost through two gears. then after i stopped at a light, it started climbing again. one of my friends said that he's never seen a water temp guage jump up so fast before, so he suggested that it's a sensor or guage problem. it's just a little unnerving with the guage moving around like that. any suggestions?? im thinking about getting redline water-wetter tomorrow and putting that in and see if that helps any. someone suggested that it might be the thermostat also. i've also been told that it's probably an air bubble in the system. i dont wanna start changing everything until i have an idea what it is that's wrong. i think i might eventually get a performance radiator with more fins+ better cooling power, but i know plenty of people with boost and no prob with the stock radiator.
any suggestions about how to find out what's wrong or tests i could try??? anyone else have this prob before???
any help is appreciated. thanks!!!