So my SHO has always had this "feature" since I bought it. I posted somewhere about this before but never dug into it but now that Winter is here and that I sometimes need to sit in the car waiting for my son to finish soccer practice, I want to try to fix this. Reason I say that is because it seems the thermostat doesn't open when the car is idling with the rad fans on when below freezing temperatures, and the cabin doesn't get any heat unless I start revving it. I read that the main causes for this are: - Fan relay stuck - Faulty AC high pressure sensor - Fan module My AC works fine so I started looking for the fan relay but I could not find it anywhere. I assumed it could be built into the fan control module so last night I decided to give that a few taps, just in case. I took it back to stock as it was suggested it could be the tune. The engine was cold and the fans were off for the first time (I've noticed). Unfortunately I did not check at what coolant temperature setting the fans started to cycle. Loaded my 87 octane tune that allows me to leave the 3 bar map sensor on during Winter and checked again. The fans were off again when I first started the engine. Not sure if this was because the engine was really cold or because me tapping the module. Today I started monitoring the coolant temperature using the torque app. Fans started running shortly after I started driving but don't know yet at what temp. I left the car idling for a bit and noticed the temp didn't go below 203 F, with the fans constantly running. Tonight I'll spend some more time to find out at what temp setting they are coming on/off. Anyone know what this magic number should be? Anyone knows if there is a fan relay somewhere?