Fast idle at 1700 rpm. Scan tool says coolant temp 72 degrees-temp gauge says 150 to 160. I suspect that I have a bad temp sensor, am I on the right track? I don't find an IAC on the scan tool, it does have a Idle Air Mtr Pos that reads "175 steps". Loop status is "open". Throttle sensor ".54 volts." O2 sensor "792 mVolts", Mass Air Flow "9 gr/sec", knock sensor "0". z