AAC valve

[blackrb20silvia]

hey guys just a Q

it think my AAC valve is stuffed

i was driving for about 5 min all good the pulled up at the lights and was idleing bout 2000rpm

so i drove home and checked everything all is good but when i pulled off the electrical clip to the AAC valve she idled normall

my Q is can i drive the car with the AAC valve not conected or does it HAVE to be connected till i get a new one???

cheers

matt

[TimmyC]

i tried to get mine off a few weeks ago and striped the bolt haha

any1 know a way i can get it off now ?

[yogi000]

i find my rb20 to have a better/stable idle without the AAC connected. It has its moments where its really good then really jumpy when it is connected

[blackrb20silvia]

yeah thats like me irratic idle when conected

as for getting it off i almost striped the screw (stupid screws all should be bolts) but stoped before i stripped the head so im with you how do you get it off????

are there any tricks of the trade?

and as soon as the son of a biatch comes out im replacing them with hex bolts that will teach them

also i spoke to a auto elect round the corner he said it will be fine to drive without it conected the only thing its for is Air Con Ect....

also the only effect is that fuel economy will suffer (in his words "by a bees dick thats all") so all is good ill leave it disconnected cuz i dont have AIR CON and like i care bout economy i moddifyied it for a reason to go hard not to ***** foot around and cry bout fuel prices

cheers

matt

[blind_elk]

i almost striped the screw (stupid screws all should be bolts)

AFAIK, they ARE bolts. And they're usually not done up all that tight.

It should be easy enough to remove the AAC, strip it down, clean it up, re-assemble and re-install.

[Jolinator]

gotta agree with blind_elk

4 bolts, in the back, whole unit comes out, clean it all out, sometimes the spring can move around inside, you can flick the resin out end, and unscrew the the brass nut in there, to remove the spring , i pulled mine out retenstioned it a little, and reset it, seal the cap with sickaflex or araldite or so

[blackrb20silvia]

ohhh was going to pull just the cylinder shaped part off where there is only screw bolts holding it on so if i pull the whole unit off do i need to get a gasket or can i use just gasket paper to make a new one?

[TimmyC]

well all but one of my bolts came off ok (still on pretty tight) but one just would not come off !!! i turned the spanner really hard and it just stripped it.

my mate said the only thing to do is use an angle grinder to cut it off, any better ideas ??

[blackrb20silvia]

ezyout!!! though that means drilling a small hole dead center and using the ezyout and reverse it out

though it prob in a real bad spot for that hey??

[SkyGTRline]

Get some Vice grips on it... Clamp it on, then loosen...

[Jolinator]

should have used a socket timmy c

4x 10mm bolts

you can reuse ur old gasket if its not ripped, etc,

[Josh]

I think mine might have the same prob, It will idle erratically, never too low always too high. The highest ive seen it would be around 2100rpm and it wont drop lower. Where is this AAC valve located? Will have a look at it later.

[r33GTS-t-200kw]

AAC valve is located on the inlet manifold, towards the firewall its fairly easy to see, 2 round cylinder things with a few bolts, take the whole thing off makes it much easier

[predator]

If you really get in a pickle, you can remove the top half of your inlet plenum, and then work on the bolt once its off the car.. Takes about 2-3 hours to pull apart then put back together.. enjoy

[Josh]

cool, now I know where to look for it. Is there any set procedure to cleaning them? like does the spring have to have a certain amount of tension put on it? Will carby cleaner do?

[Jolinator]

predator, you should try polishing it sometime, it WILL KILL YOU lol :wizard:

[blackrb20silvia]

i had idle bumped up round 2000rpm for some reason ???

so i just diconected the AAC valve prob solved

(tried to clean it but still did not work???)

[Josh]

mine idled as high as 3000!!

I tried mucking around with the Idle Adjust Screw, It didnt seem to do anything... when I disconnected the AAC valve the idle dropped a little. How would I go about cleaning it? Dont want to break it.

[blackrb20silvia]

pull off the AAC valve (the four bolts 10mm socket) there will be a gasket there all should come off without breaking the gasket, once off get some carby cleaner or brake cleaner and spray into any visible holes try to seal some off with your fingers adn shake it round.

What you are trying to do is free up the plunger that has been jamed in carbon and oil and all the other shit that enters the inlet

then replace

but this did not work for me i think i have a prob in the wiriing which is holdinig it open but i dont know just disconnected it then set the base idle

cuz thats what the service manual says for setting idle

Pull off conector to AAC valve then turn screw to set idle!!

[Josh]

Cheers mate, greatly appreciated. Yeh I read the bit about adjusting the base idle with the AAC wiring off, but it did nothing, I think it must be too full of crap inside so I will clean it tonight and hopefully I will get a regular idle of 600 instead the 1500-2000-3000 I have had lately. I will let you guys know how it goes.