steve56 Posted May 14, 2015 Share Posted May 14, 2015 I pulled my IAC valve to clean it. I was having an idle from 2200 down to 1500 at start up. How does it work and can it be tested. There is an adjustable 3 wire piece on the top and a coolant connection at the base. So it must open and close by a combination of the temperature of the coolant running through it and a signal from the adjustable connection on the top. I'm looking for description of how the thing actually works and if it can be tested. Quote Link to comment Share on other sites More sharing options...
ocei77 Posted May 14, 2015 Share Posted May 14, 2015 Download the FSM and get all the info you need there. It does work on coolant temp.So the ect sensor must not be defective and the iac itself should not be carboned up. O. Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted May 14, 2015 Share Posted May 14, 2015 Its adjustable but you can't adjust it. Mess with the placement of the drive motor and it'll never idle right. There really isn't much to it. If it looks gummed up, clean it. If it still doesn't move easily replace it. Quote Link to comment Share on other sites More sharing options...
steve56 Posted May 14, 2015 Author Share Posted May 14, 2015 Whats the FSM and where can I download it? Quote Link to comment Share on other sites More sharing options...
upnorthguy Posted May 14, 2015 Share Posted May 14, 2015 Whats the FSM and where can I download it? Factory service manual. http://jdmfsm.info/Auto/Japan/Subaru/Legacy%20Outback/ Quote Link to comment Share on other sites More sharing options...
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