Join Date: Apr 2001
Location: Concord, NC, USA
<<<<HELP>>>> I need to know where the cooling fan switch is on an 1986 IROC-Z with tune port injection??? or how the cooling fans are controlled, turned on, etc. There is no switch of wire for a switch on the passenger side head, the only 2 switches are in the front of the intake. These are the ECM coolant sensor and the cold start sensor. I have replaced the fan relay, temp gauge sensor, put a bigger radiator in (3 rows 17 fins per inch) and new thermostat. Fans do not come on untill 240 degrees and off at 195 degrees. I need HELP thanks.