I just bought a 91 lx 4 cylinder, the temperature gauge doesnt seem to move at all and I'm not sure but i dont think the fan is turning on (i'v gotten out leaving the car running and the fan wouldnt be on). I thick it might be the temperature sending unit, I bought a new bought cant figure out how to install it, please help, oh and if you have any ideas on other things it could be that would be nice. thanks