Andrew thats the one. The MS coolant vairables control whether or not the fast idle is activated, and once it hits warmup it throws out the switch in the relay board turning off the power to the aux air valve. If you've got it wired up independant theres going to be power to it all the time, it requires ms to tell it when to turn off, then once it is turned off the actual heat not power keeps it closes.
This was taken off an alfa, and from it they are bolted to the alloy tappet cover which transmits a lot of heat and keeps it warm after engine shut off.
As i said if this cools down on its own while the engine is still hot and reading 70degrees coolant hot the ms wont even power it on and it will just drag air through it cooling it down more and stay on forever.
When i tried mine under the manifold it worked closed up from power not heat then shut off but after turning the car off for a while it was cold straight away. This bracket i've got on the extractor side works fine now, it gets pretty warm from the extractors and the alloy is the best transmitter of heat.
Dear webmaster - i can't upload pictures using Firefox, they upload and complete however dont show in the message
Download Attachment:
aur air (Medium).JPG80.14 K