okay so my temp guage never worker when i got my car from the previous owner. So after many hours and a few flash light batterys I got it hooked how i think it should be. I'm running into problems now though. My engine overheated one night so i checked for air lock (recently changed heater hose) there was no air lock. Then i realized my radiator cap was shot. got a new one but the radiator hoses expnded. I ended up rewiring and positioning my dual electric fans for maximum cooling. Then i flushed the radiator twice. finally got the water to come out clear after the second flush. ran the car and everything seemed to be running very well. I added anti-freeze before dark ( a must in this area) and then ran it around town pretty hard at first then more just joy riding. The guage still points almost all the way to overheating. I recently changed to a 160 thermostat and right when it opens my guage almost maxes out. Do I have a wiring problem or did autozone just give me a crappy coolant sensor? also the one wire for the sensor is grounded to the alt. bracket (it seemed to be the right place) thanks in advance for all your help!