Jump to content
SAU Community

Recommended Posts

i just did it on my R32 (rb20det)

took about 30mins, had the ecu out too, but didn't have to touch it. I used combustion chamber cleaner instead, and set the idle to 900rpm warm...up from 600rpm (factory spec)

idle's much smoother, no more stalling issues with the hks ssqv, annoying stalls with the A/C on, or stuttering when clutching in and decellerating.... or rpms dropping when im driving with the headlights on and heater on at night. this is such a wicked faq. there is no excuse not to clean/inspect your AAC valve!

THANKS INSU :thumbsup:

When I took mine off for the clean I took the idle adjust screw all the way out. Around it was a rubber sleeve. Now whenever I try to screw it back in the sleeve just rolls up the screw and I'm concerend that air may leak in through any gaps.

Anyone got any suggestions on how to get this rubber to seat on the screw inside the thread again??

What else do you do when you're playing with a screw and you can't get the rubber in?? Whack a bit of lube on it! :mellow: Bit of Vase', you'll be fine.

I believe the rubber is only there to prevent the screw from adjusting with engine vibration and such.

  • 2 months later...

this solved the fluctuation in the revs and stopped my car from stalling. it only take about 30 mins if you know what your doing. i didn't even have to adjust the idle after it was perfect.

even if you dont have rev or stalling problems i highly recomend you do this.

BIG THANKS to INSU for this diy

i don't hate my car anymore thanks to you!!!

great tutorial, helped me immensely in cleaning my aac valve on my r32 gts-t. two things i have noticed though, on my car you had to disconnect the TPS rather than the brown plug on the AAC valve to adjust the AAC idle as you would on an r33. secondly, did anyone else find it ridiculously hard to screw in the idle screw while adjusting the AAC valve idle? i dunno why but i got it down to about 900rpm and its pretty much stopped moving.

anyways thanks again dude great writeup!

great tutorial, helped me immensely in cleaning my aac valve on my r32 gts-t. two things i have noticed though, on my car you had to disconnect the TPS rather than the brown plug on the AAC valve to adjust the AAC idle as you would on an r33. secondly, did anyone else find it ridiculously hard to screw in the idle screw while adjusting the AAC valve idle? i dunno why but i got it down to about 900rpm and its pretty much stopped moving.

anyways thanks again dude great writeup!

If it was ridicuously hard to turn, probably the O-ring on the AAC Value screw is all dry and crumbling. Time to replace that O-ring.

When I took out my AAC value, I removed the screw, the Solenoid, the piston and spring inside and gave it a good clean with carby cleaner. Put it all back together using carby cleaner as a lubricant and replaced the old tired O-ring. Cost my $0.50 for the O-ring.

If it was ridicuously hard to turn, probably the O-ring on the AAC Value screw is all dry and crumbling. Time to replace that O-ring.

When I took out my AAC value, I removed the screw, the Solenoid, the piston and spring inside and gave it a good clean with carby cleaner. Put it all back together using carby cleaner as a lubricant and replaced the old tired O-ring. Cost my $0.50 for the O-ring.

Did you ask for a receipt?

Did you ask for a receipt?

I've just got to the stage where I have pulled it out ready for cleaning. Jeez it's fiddly!!

I'm looking in your pics as when I pulled the last hose off I think I knocked some bit of plastic or something down around and settled in the many cavities beside the engine. Can't see it, I hope I remember to jack the car after all this and see if I can see it from the bottom.

Wierd thing is I can't see any clips or other bits I am missing (compared with your photos)

I guess that's what I get for doing things at night :)

Hope it fixes the occassional hunting.

My car will be fine for a month or so - then a hot day or add the A/C and you'll get rev hunting for 5 minutes or so..

quite random..

Ok - all done. Cleaned it up..but I got a hint of the hunting again today. maybe part of it is faulty?

Anybody else found this.

It will be ok for a few days then for a bout 30 seconds the idle will fall and rise...the injector duty cycle stays the same (I have PFC)..

Sounds very much like it is the AAV and that is why I cleaned it.

The funny thing is that my idle is pretty much perfect, but adjusting the ECU's fine adjustment screw does nothing at all, winding left or right does not affect my idle.. weird.

Is it because I'm using a remapped ECU? with the rev limiter taken out?

I tryed this today and all was going well, i adjusted the idle with the brown bit unplugged (i have a 1989 R32 Skyline) and then plugged back in, revs were nice at 1000rpm then i turned her off, started her up and instantly the revs were up around 1600rpm. i then tryed again this time with the TPS disconnected and then re-connected and the best i can get is about 1500rpm (including adjustin the ECU idle).

Seems to backfire and burble on engine breaking a lot more but still feel smooth when driving

Could this be leaks or should i now try the IAC valve under the throttle body?

initial reason for cleaning the AAC valve was idle hunting and stalling which i still suspect to be a dodgey BOV but now i cant get the engine to idle how it used to (even if it was stalling).

Edited by god's rx

I just cleaned mine out, alot easier than i thought...took about 45min for a beginner.

Yea i also had troubles putting the idle screw back in, but what i did was unscrew it out, then back in, back n forth pretty much until it found its way back in the hole pretty smoothly. Now my idle sits steadely on 900rpm wen warmed up. Great DIY Insu, solved my stalling issue. :happy:

My ECU adjustment screw does nothign aswell, not a thing. I have cleaned my ACC valve ect, but on the R33 if i disconnect the Tp it does not idle below 900rpm, eaven with the ACC screw all the way in. No go for me. I think my Cold start valve is stuffed or not closing.

I have tested for air leaks, but no good there either.

just performed on my 32 and went sweet, really helped all the problems! One thing though..when i was adjusting the idle screw on the side of the ecu, it didnt nothing at all and i think i may have gone past the 12 o'clock point! Is this ok, any side affects? It did nothing to my idle!

just performed on my 32 and went sweet, really helped all the problems! One thing though..when i was adjusting the idle screw on the side of the ecu, it didnt nothing at all and i think i may have gone past the 12 o'clock point! Is this ok, any side affects? It did nothing to my idle!

The ecu is only meant to adjust the idle in 50rpm increments from memory, and should only be used if for some reason your car isn't idling as it should from the idle by-pass screw. Even through the whole range of the screw which is like 70deg or something, there isn't much adjustment there.

I wouldn't worry about it too much, cause i've never heard of anyone having to use the computer adjustment.

As for going pas 12 o'clock, if you do it puts the car in diagnostic mode from memory. Shouldn't be a problem if you turned back. If you turned it beyond 3-4 o'clock i think it is thou, you can f**k the little switch, so don't do that.

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

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...