What is an AAC?

[Bazelinez]

Hey guys,

heard this term thrown around a lot in regards to idle control. What is it? Where is it and do you think cleaning it will help my cold start idle up because at the moment the car struggles to idle up when cold, I have to give it a hand with the pedal....

sorry for a rather crappy thread but I did search first......

cheers!

[Ant]

Have a read of this:

http://southernskylines.com/index.php?page=aac_1

Unstable cold idle/stalling when cold is definitely a symptom of a dirty AAC/IAC valve!

[Bazelinez]

cheers dude, might take it off on the weekend and clean it. Anything I should be wary of or know as I do it? Would electrical contact cleaner be okay for it...

cheers!

[Slide]

carby cleaner

[Bazelinez]

righto cheers fellas, any idea how long it takes on an RB20DET? Don't wanna do it thinking it'll take me 10 seconds and get stuck and need the car

sorry for the noob questions!

[eXc]

took me 30 mins having no idea what I was doing.

[OVADRV]

how did it go after cleaning it.????

[siksII]

cheers dude, might take it off on the weekend and clean it. Anything I should be wary of or know as I do it? Would electrical contact cleaner be okay for it...

cheers!

u will need something stronger than that, try carby cleaner..

[JXL]

cool i wanted to know about this aswell cause i had a dodgy idle regardless of cold or warm the engine would spike idle to 1500rpm.

it has gone away since i changed the sparkies, engine temp sensor and thermostat but i got told to check this out aswell.

can i ask another abbreviation question.

what is the AFM???

cause i got told to clean this thing aswell. i did a search but nothing came through i don't know if the search this has been disabled or something cause its been going on the last couple days.

[Bazelinez]

AFM = Air flow metre. Its the pipe with a metre in it located after the air filter, you can see the plug going into the side of it...

I cleaned mine with contact cleaner from dick smiths, was very durty.....

[JXL]

cool thanks for that will have a look at it to see if it needs a clean too.

[Bazelinez]

hey guys,

finally got around to doing this........ I think.... Are you meant to take off the little brass cloured thing with the plug or the actual metal part with 4 bolts holding it and a gasket? I wasn't sure so decided to take off the brass part and in the process nearly lost the little spring!! It looked perfect so I blasted some CC down the hole where it goes into the metal thing.

seems a little better, do I need to take the other part off to do it properly? Will that gasket need to be replaced or will it be okay?

cheers!

[siksII]

i believe the best thing to do is remove the whole thing, and yes you will need a new gasket, it is paper..

you can get a roll of that paper gasket for around $8

[Bazelinez]

thanks mate, i'll try it on the weekend.

[r32nissan]

Can anyone please tell me exactly where this is? I can only find pics of the r33 ones. I'm havin the same problems with my idle and my cold start.

Help my 32 out please:P

[B0oStEr]

The AAC can only control rpm within a limited rpm range, more like fine tuning.

Most of the additional air the engine needs during warm up is supplied by the air regulator.

It's mounted under the throttle body on the inlet runners.

It has a hose in from before TB and a hose out to the inlet manifold as well as an electric plug and it allows air to bypass the throttle body during warm up.

If it sticks open you get a fast idle but if it sticks closed it'll have a slow idle or stall when it's cold.

[eXc]

Can anyone please tell me exactly where this is? I can only find pics of the r33 ones. I'm havin the same problems with my idle and my cold start.  

Help my 32 out please:P

http://home.kooee.com.au/exup250/aac.jpg

http://home.kooee.com.au/exup250/aac1.jpg

Also, you may want to have a look at this thread. http://www.skylinesaustralia.com/forums/sh...378#post1280378