today after school, i went to autozone and bought some stp fuel injecter cleaner, i then drive home after i put half bottle in the gas tank. after 2 minutes, i notice the temp gauge was going up very very fast, all the way to the red. so i pull over and open the hood. i heard somethings boiling, maybe the coolant, so i turn on the heat and waited 10 minutes, after i get home, the temp gauga is at the middle which seems fine, so i took a freshlight and try to check wut is wrong. all i notice is that both fans is not running, can that be the problem? anything wlse i should check?