20valve Cold Start Has Very Low Idle

[badtoy]

My 20V ST has a very low idle on cold start. Its at 400-500 RPM and supposedly its at 1500 RPM. Does this a connection with the water temp thermoswitch/sensor? My thermoswitch is busted coz the aux radiator fan is constantly on, even on coldstart.

 

or do I need to take out the IACV and clean it?

[Medicine_Man]

Well if the thermo switch is busted I'd be replacing that for starters, The ECU would be throwing the fan on as a safety feature so the engine doesn't cook as it can't get a proper reference temperature..

 

If that doesn't fix it then definatly look at the IACV..