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?

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.

You shouldn't need the AAV, I was thinking the IAC.

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???

IAC-Idle Air Control

 

-Brian

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.

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.

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..

I'll probably try it with the AAV and see how it goes then. Need some time to get things installed and experiment.

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.

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: