Jump to content
SAU Community

Recommended Posts

Hi peoples! I noticed while i was snooping around my engine bay that the the brown outlet on my aac valve doesn't have anything plugged into it.I have a forward facing plenum on my RB25 and the brown and purple outlets are not easily visible or easy to reach.I can't see a brown plug with wires attached that matches the brown outlet on the aac valve.I have however fond a dark blue on dangling around the same area. The purple plug on the aac valve is currently connected.Will it have any adverse effect on my engine if the brown plug remains as is?

Link to comment
https://www.sau.com.au/forums/topic/335628-aac-valve/
Share on other sites

you unplug it when setting the correct idle rpm, are you having idle issues?

Yeah the electronics do some sort of compensation, so you unplug, adjust idle, reconnect. I'm guessing without it connected you could expect the idle to be too drop low when the air con is on?? Or maybe when its cold?

Link to comment
https://www.sau.com.au/forums/topic/335628-aac-valve/#findComment-5432848
Share on other sites

It still idles at around 1000rpm when cold and idles between 750 &800 rpm when warm.still seems to idle around 750 with A/C on as well.Doesn't concern me too much,just wanted to make sure it wasn't damaging the engine or anything.

Link to comment
https://www.sau.com.au/forums/topic/335628-aac-valve/#findComment-5432894
Share on other sites

It still idles at around 1000rpm when cold and idles between 750 &800 rpm when warm.still seems to idle around 750 with A/C on as well.Doesn't concern me too much,just wanted to make sure it wasn't damaging the engine or anything.

nope it wont damage the engine

Link to comment
https://www.sau.com.au/forums/topic/335628-aac-valve/#findComment-5433940
Share on other sites

There should be a brown plug for the AAC (idle speed control). The purple plug is for the FICD solenoid. Basically it increases the idle when the AC is switched on. The dark blue plug is for the air regulator which operates independent of the ECU and is used to increase the idle when the engine is cold. The air regulator closes once the engine gets warm.

If the AAC is not connected there must be another means of idle control (presumably you have an aftermarket ECU).

Link to comment
https://www.sau.com.au/forums/topic/335628-aac-valve/#findComment-5438851
Share on other sites

There should be a brown plug for the AAC (idle speed control). The purple plug is for the FICD solenoid. Basically it increases the idle when the AC is switched on. The dark blue plug is for the air regulator which operates independent of the ECU and is used to increase the idle when the engine is cold. The air regulator closes once the engine gets warm.

If the AAC is not connected there must be another means of idle control (presumably you have an aftermarket ECU).

Yes, i have power fc. thanks for your info mate. So in other words if i put a stock ecu back in it would idle crappy?

Link to comment
https://www.sau.com.au/forums/topic/335628-aac-valve/#findComment-5441120
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • GTSBoy on your suggestion on another thread I had a look at those injectors and ended up getting them because of the quality.  Got the expensive ones.  
    • Hey guys been looking everywhere to try and find the correct gtr hood latch support part number but only found the first half and when I search with that number it sends me to an r34. The first part I found was 62515. If anyone could help me with the rest then I’d really appreciate it. Or if there’s some alternative hood latch support that would work even better cause I can’t find any for sale. (Searched on upgarage, partsouq,buyee,rhdjapan) 
    • If you've only done the upper control arms on the rear, AND you have changed their length (by more than about 1mm) to set the camber you want, then you will definitely need/want to install traction arms also. Adjusting the camber arms on their own WILL introduce bump steer and make the car unpleasant to drive. Most owners have no idea that their car could behave infinitely better than what they put up with. I'm not entirely sure what the Stageas need, but I am thinking that unless you have massive front spring rates and pretty soft rear springs, you have waaaay too much rear bar. Oversteer city, in my estimation. Combined with possible excessive bump steer from maladjusted arms, that could be a recipe for nastiness. ATR43SS2 is not a highflow. It is an outright replacement turbo. It's a little bit bigger than the largest highflow profile that Tao does. Probably a solid 300rwkW turbo where the bigger highflows will be about 30-40rwkW less. Nevertheless, we're only talking about ~300 rwkW, which is well within the abilities of the stock ECu to run with a Nistune on board. I would do so without hesitation - and I will be doing so when I get my finger out and actually get the injectors and AFM installed. But, if you would prefer to drop a whole lot more money on the ECU side, then I suspect you're looking at Haltech. The Haltech fanbois here will all spout on about all the available engine protection you can have, that you can't have with the Nistune option. And they're right. But it doesn't really come for free either. You will spend more money on extra sensors and the like, plus the work to install them. If the engine was built and therefore represented a big investment to protect, then I'd say definitely do it. If you view the current (and forever into the future) shortage of replacement engines as something to prompt similar protection, then also, do it. If you see a destroyed RB25 as an opportunity to put in a Mercedes or other V12 (like I kinda do)... then your perception of the risk/reward might differ. These are good injectors. You can also get a "better" set of the same with more flow matching, for more $$. 1000cc is where you will want to be. You will need an R35 AFM and adapter tube if you want to stay with Nistuned stock ECU. Otherwise, if going Haltech, you can ignore. As for intercooler. Just about anything will do. You're only talking about ~300rwkW. Just put a big core in there. Be aware that return flows do add significant pressure drop and will cost power and will make the turbo work harder to achieve the same goals. If you can manage a proper crossflow, do it. I'm keeping my very good return flow because I'm only expecting to be in the ~250rwkW range, and will live with whatever outcome I get.
    • I have a heap that i have collected if you want some authentic ones still. Pm me if your interested!
×
×
  • Create New...