Jump to content
SAU Community

Rb26 Standard Idle

SUN32RISE

By SUN32RISE,
in General Maintenance

 Share

Recommended Posts

SUN32RISE Contributor

SUN32RISE

Posted
Posted

Hi out there, does anyone know what an rb 26 is meant to idle at standard, i have an arc air box and cat back exhaust.

it idles around 1050-1100

from past experience all my cars being manual have sat around 800 or so.

does anyone know how to adjust the idle on an rb26?

do you adjust the throttle bodie linkage near the accelerator cable or something else?

any info would be much appreciated.

Link to comment
https://www.sau.com.au/forums/topic/280946-rb26-standard-idle/
Share on other sites
Jason82 Contributor

Jason82

Posted
Posted
Hi out there, does anyone know what an rb 26 is meant to idle at standard, i have an arc air box and cat back exhaust.

it idles around 1050-1100

from past experience all my cars being manual have sat around 800 or so.

does anyone know how to adjust the idle on an rb26?

do you adjust the throttle bodie linkage near the accelerator cable or something else?

any info would be much appreciated.

Hi mate! On the RB26 you have three methods of adjusting ur idle speed: ECU (aftermarket), throttle linkage and AAC Valve. The main place to adjust ur idle would be on the AAC valve located under ur intake plenum. This is an adjustable screw, mid section under side of plenum facing forward. If you screw this screw clockwise, ur idle speed will decrease, anti clock wise and ur idle speed will increase. I personally would not adjust ur throttle linkage, leave it be! RB26's are happy to idle around 650 - 800 RPM. I have a Nissan service information sticker under 33 vspec bonnet and it stipulates idle RPM to be 650. Hope this helps u out!

frankiman Contributor

frankiman

Posted
Posted
Hi mate! On the RB26 you have three methods of adjusting ur idle speed: ECU (aftermarket), throttle linkage and AAC Valve. The main place to adjust ur idle would be on the AAC valve located under ur intake plenum. This is an adjustable screw, mid section under side of plenum facing forward. If you screw this screw clockwise, ur idle speed will decrease, anti clock wise and ur idle speed will increase. I personally would not adjust ur throttle linkage, leave it be! RB26's are happy to idle around 650 - 800 RPM. I have a Nissan service information sticker under 33 vspec bonnet and it stipulates idle RPM to be 650. Hope this helps u out!

yup, that is by far the best and easiest way to ajust the idle

when your ajusting it, start the engine, get a long screwdriver, turn the screw, after each ajustments wait about 10~15 senconds for the idle speed to settle

SUN32RISE Contributor

SUN32RISE

Posted
  • Author
Posted
yup, that is by far the best and easiest way to ajust the idle

when your ajusting it, start the engine, get a long screwdriver, turn the screw, after each ajustments wait about 10~15 senconds for the idle speed to settle

thanks heaps guys eally appreciate your info. :)

  • 7 years later...
GH05T Grand Master

GH05T

Posted
Posted

a very common cause of high idle for the rb26 is some plonka has cleaned inside the throttle bodies.

they have a factory film, clean that off and you get a 1100-1200 idle. it wont be helped by the idle screw either so crack the plenum off and check that also.

Duncan Grand Master

Duncan

Posted
Posted
6 hours ago, powerdbygarrett said:

Hate to bring up an old thread but can someone confirm the location of the screw? 

Is it one of these guys? 

Thanks!

unnamed (1).jpg

Wow a car that still has HICAS!

Anyway, that is the AAC and the idle screw is on that. It may be the screw in your red circle (hard to tell in that pic). Depending on how standard your car is, the ECU also has an idle adjust screw and the throttles themselves could be adjusted.

If you have developed a high idle, its more likely you have an air leak somewhere in the intake. AAC should never really need adjustment unless you've just given it a full clean out internally

powerdbygarrett Enthusiast

powerdbygarrett

Posted
Posted
On 11/6/2016 at 11:20 PM, GH05T said:

a very common cause of high idle for the rb26 is some plonka has cleaned inside the throttle bodies.

they have a factory film, clean that off and you get a 1100-1200 idle. it wont be helped by the idle screw either so crack the plenum off and check that also.

This is the way I purchased the car. I am not sure how the idle was with the previous owner. If the film has been cleaned off, what would be the solutution?

On 11/7/2016 at 1:56 AM, Duncan said:

Wow a car that still has HICAS!

Anyway, that is the AAC and the idle screw is on that. It may be the screw in your red circle (hard to tell in that pic). Depending on how standard your car is, the ECU also has an idle adjust screw and the throttles themselves could be adjusted.

If you have developed a high idle, its more likely you have an air leak somewhere in the intake. AAC should never really need adjustment unless you've just given it a full clean out internally

The car seems pretty standard, not really modded. just basic stuff. I will check for vacuum leaks. 

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      Jacks that fit under GTR lips that can reach the subframe?

      By MBS206 · Posted

      You know how your car rolled through a fence in your last jacking escapade? Scissor jacks increase the likely hood of that sort of thing happening immensely!
    • Piggaz
      Jacks that fit under GTR lips that can reach the subframe?

      By Piggaz · Posted

      http://calfinn.com.au/product/1500kg-standard-trolley-jack-cj-2t-c/1500kg-standard-trolley-jack-cj-2t-c   I have this and fits under a S3 33 GTR with no issues. Purchased in 2009 and not one issue. It was $950 back then. Not cheap but something so important isn’t worth cheaping out on.
    • MBS206
      R32 GTST - 600KW+ RB28/CD009 Build

      By MBS206 · Posted

      Just trying to get my head around this. At 5psi of boost, you turn on your wmi pump, and then you're using a 3000cc injector, to allow flow upto the actual engine, where you have your 6x200cc injectors and a 500cc injector. If the above is correct, what advantage are you obtaining by having the 3000cc injector blocking flow, is this just incase a line breaks between that injector and the motor you can stop flow immediately? Or are the 6x200cc and 500cc less injectors and just spray nozzle?
    • f00stx
      Intro/R33 owner

      By f00stx · Posted

      Welcome! New member myself, but I had an R33 back in 2002. Best advice I could give, based on my experience: if you're running the factory turbo, be very conservative with boost. I made the mistake of just fiddling around with the boost controller and cranking the boost for fun, and the end result was my intake pipes popping off frequently from the constant deluge of oil that was being blown into the recirc by the stressed-out turbo, which itself was siphoning oil from the engine and farting it out both sides of its centre bearing (or something to that effect). If I could do it all again, I would have gotten a new turbo and had a tune dialled in professionally and then just left it alone! Funny you mention the metal shavings in the gearbox, as I had the same thing - the probe plug (magnetic drain plug, essentially) would come out caked with shavings. At least it was doing its job. Not sure if that's just sacrificial wear and part of the deal, or if my gearbox was shagged, but I wasn't abusing it. Enjoy the R33 - they're a dying breed, and if they weren't $35k+ on CarSales in Queensland, I might have picked up one of those again, instead of the 370GT I own now (though I'm loving the 370GT, that big 3.7L V6 just hits different).
    • f00stx
      Second time Skyline owner (R33 GTS-T and now a V36 370GT)

      By f00stx · Posted

      Howdy folks. I owned an R33 back in 2002, which was thoroughly beyond my capacity (financially speaking) to maintain/insure, so we parted ways in 2004. Fast forward 21 years (to literally yesterday, in fact) and I'm now the proud owner of a 2007 V36 370GT. I'm happily surprised by how much power the VQ37VHR makes, compared to the RB25DET, considering the latter is turbocharged. I had planned to add a turbo at some point but I'm on the fence about whether I'll even need it (though I do love the sudden onset of extra torque). Any other 370GT owners around the traps, I'd love to hear about your experiences with this car (good and bad).
×
×
  • Create New...