habib99 Posted July 1, 2006 Share Posted July 1, 2006 EA82T What do you do with the 'auxilary air valve'? Not sure about leaving it as the MS wont know what it's doing -wont this make tuning/idle hard? Quote Link to comment Share on other sites More sharing options...
4x4_Welder Posted July 1, 2006 Share Posted July 1, 2006 Doesn't that control idle speed, same as an idle air controller? If you have a different idle air controller you're going to use, then take it off, but if not, you'll have to find a way to make it work. Quote Link to comment Share on other sites More sharing options...
[HTi]Johnson Posted July 1, 2006 Share Posted July 1, 2006 You shouldn't need the AAV, I was thinking the IAC. Quote Link to comment Share on other sites More sharing options...
habib99 Posted July 1, 2006 Author Share Posted July 1, 2006 You shouldn't need the AAV, I was thinking the IAC. ok,...what is IAC? Edit: Ahhh think I've worked it, idle adjust screw??? Quote Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted July 1, 2006 Share Posted July 1, 2006 IAC-Idle Air Control -Brian Quote Link to comment Share on other sites More sharing options...
habib99 Posted July 1, 2006 Author Share Posted July 1, 2006 ok,...what is IAC? Edit: Ahhh think I've worked it, idle adjust screw??? Pressuming the throttle doesnt close ALL the way, I get that the AAV is to provide air into the intake bypassing the throttle position sensor and throttle valve for cold starting but I'm thinking I can compensate for cold idleing through the Megasquirt software and get rid of this variable bypass route with or without a stable fixed -small amount of bypass -as has been suggested before to fit a 2mm hole in an otherwise permenantly open pipe between pre and post throttle valve. Quote Link to comment Share on other sites More sharing options...
4x4_Welder Posted July 2, 2006 Share Posted July 2, 2006 The megasquirt system is set up to use a General Motors type idle air controller- it just sends more or less power to the solenoid to control idle speed. I don't think the idle air controller has a feedback signal to say where it's at. The system can be run without this, but it may cause some issues with stalling both hot and cold. On the stock system, the computer uses the AAV/IAC to keep the engine at the specified idle speed, and to increase speed when the engine is cold. It always lets a certain amount of air past, the computer opens it more when the a/c is running, or if it's in gear (automatic) or when you let the clutch out a little to help keep the engine from stalling. Quote Link to comment Share on other sites More sharing options...
PoorManzImpreza Posted July 3, 2006 Share Posted July 3, 2006 all you have to do to get MS to idle correctly with our stock AAV is to richen the mixture it's actually quite nice not having to set up a real IAC valve our subs already have a perfectly functional one that requires no programing except a lil extra fuel.. Quote Link to comment Share on other sites More sharing options...
habib99 Posted July 3, 2006 Author Share Posted July 3, 2006 I'll probably try it with the AAV and see how it goes then. Need some time to get things installed and experiment. Quote Link to comment Share on other sites More sharing options...
Guest shadow Posted July 4, 2006 Share Posted July 4, 2006 When MS v1 came out the preffered method of idle control was using a Bosch AAV, of which ours are a licensed Japanese copy. In fact the AAV on the spider intake manifold is physically identical to the MS recommended european version. An AAV is still a highly preferred choice due to simplicity even though we now have IAC capability with MS. Quote Link to comment Share on other sites More sharing options...
habib99 Posted July 5, 2006 Author Share Posted July 5, 2006 When MS v1 came out the preffered method of idle control was using a Bosch AAV, of which ours are a licensed Japanese copy. In fact the AAV on the spider intake manifold is physically identical to the MS recommended european version. An AAV is still a highly preferred choice due to simplicity even though we now have IAC capability with MS. thanks:headbang: Quote Link to comment Share on other sites More sharing options...
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