Jump to content
SAU Community

Recommended Posts

My Stagea has started to stall at idle/low revs. I am assuming it it is a fuel flow problem and will replace the fuel filter this weekend. While i am at it I will change the air filter, clean the afm with contact cleaner and have a look at the fuel pump for problems/dirty fuel.

Is there anything else that is an easy fix?. I want to make the putty rd cruise and will do the obvious, easy stuff all at once.

Link to comment
https://www.sau.com.au/forums/topic/397977-stalling-at-idlelow-revs/
Share on other sites

cheers for that , reading some threads that suggest this should be high on my list for a fix.

found this thread , http://www.skylinesaustralia.com/forums/topic/110431-diy-aac-valve-cleaning-idle-reset/page__st__120

May be beyond my scope of works for today , but god damn it I want to drive Putty rd tomorrow.

okay that was a fail. no putty road for me. :verymad:

Some details

Car C34 s2 rs4s - stock in the engine bay.

stalling at idle, hunts around, splutters , then dies. If left for 5 min restarts. if the revs are kept up , no problem.

I have changed the fuel filter

Changed the air filter.

Didn't do the afm today as I have to go out. Do people think this could be the cause? will try tomorrow morning.

The above guide for aac clean is for a r33, and the neo appears to be different, plus I'm not comfortable yet doing this job. SO it's off the mechanic because I love giving them all my money. :wacko:

okay tested theory that isthe idle control. Cold start is fine, once it warms up a little the acc kicks in and it splutters, then stalls. It will not restart until cooled down.

Off to repco for few bits. The process for the neo is a little different, same idea.

Okay, fingers crossed, it looks like I have fixed my problem. :banana:

Cleaned the AFM and Acc today. I am convinced the acc was the problem, due to the level of carbon deposits. Car has done 100k so no surprise. I'll need to tweak my idle speed, sitting at about 900 rpm ( should be 650 ) but I'll wait a week to be certain the problem is gone.

See this thread for NEO specific directions. The fourth bolt down the back is a bitch to get out.

http://www.skylinesaustralia.com/forums/topic/344264-cleaning-the-aac-valve-on-rb25det-neo/

I highly recommend this be done as preventative measure. :yes: If you are worried about the skill level required it is very easy, just take your time and follow the instructions.

time for a Homer dance ..

Let's just hope my car doesn't burn down. :whistling:

  • 3 weeks later...

an update of no success so far.

Pulled out the AFM , one of the techs at work re did all the solders ( complete de solder and re solder ). Got the car through pink slip no problems but it failed again while driving to work.

Plugged a cable in to check for error messages, nothing. Had the laptop plugged in today while I went for a drive, stalled and again all I had to do was give the airbox a whack to get it started again. There is no drop in voltages on the afm in the logs, so will continue to hunt out my intermittent fault.

I'm now over it but will have to wait for funds to send to a mechanic.

could you check wire continuity to the AFM pin on the ECU? maybe the wire has intermittently earthed somewhere. If not, then get your techs to inspect the ECU for joints that are suspect?

I'm just playing along at home.... :whistling:

I would have a very thorough look for a vacuum leak as well. There are lots of little vacuum hoses that can open up when hot and cause hunting and stalling. It still seems like another issue but the simple things are worth checking out. Particular attention to the small hoses at the front of the plenum as they are often missed.

Whacking the airbox sounds awfully like AFM/AFM wiring is the culprit. Are you certain that the tech re-soldered the afm correctly? If so, then it is the wiring around the plug.

No error messages, just a lower voltage to the ecu causing lean conditions. Solder the pins on the board where the plug goes in again, if all else fails change it.

No point taking it to a workshop to diagnose until that's done at least, as that's what they will do first.

sorry muppet at the Keyboard -

Thanks guys, I would thought I'd see an error message OR A drop in voltages if the AFM was faulty. It's now booked in at ASR for later in the week, will let you know if it is solved.

There is no drop in voltages. ( that I can tell ) but I will try to get another to swap in this week.

I have no idea what I'm doing in general, so I'd like it looked at. On the bright side I have learnt alot and gained confidence in doing stuff for myself.

No error messages, just a lower voltage to the ecu causing lean conditions. Solder the pins on the board where the plug goes in again, if all else fails change it.

No point taking it to a workshop to diagnose until that's done at least, as that's what they will do first.

Andrew @ ASR is a good guy Scotty. If the car is down there Thursday morning I will pop in and have a look too.

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

    • I do believe from context he is talking about a S0/S1 R33 RB25 with associated ECU and Wiring for that, and a manual gearbox into a R34 N/A Auto. I don't have the knowledge of all the pinouts and such but my gut feeling from doing my own conversion is to use as much of the R33 stuff that you can. The "car" wiring is quite seperate from the "Engine" wiring when all things are considered. The only things to truly consider 99% of the time is the cluster, reverse lights and potentially disabling the 'not in P/N' immobilizer circuit.
    • A realistic expectattion of how long it has to last also comes down to.... when do you think you will be banned from registering and driving old petrol powered shitters? It's 27 years since that thing was built. It probably rusted out 15 years ago. It was probably repaired and looked OK for another 10. If you do a similarish bodge job now, or perhaps slightly better with some actual rust conversion and glassing, then.... get another 10-15 years out of it, after which you'll only be permitted by the CCP to drive electric cars manufactured in their Shenzen zone anyway. 
    • Let me assume that the concern over a manual ECU is that the NeoDET that you have was an auto and has an auto ECU. That ECU will not be a problem, but you WILL have to Nistune it. And you would have to Nistune it even if you had a manual ECU, because the turbo ECUs will shit the bed if they do not have all the things that they were told they have to have, to be happy. The big one being the TCS CU, which you won't have in your car. Anyway, with an auto ECU (which I have running my originally auto NeoDET in an R32) Nistune allows you to put in a Stagea image which doesn't panic about the absent TCS, and allows you to override a whle bunch of other annoyances that would otherwise see the check engine light on 100% of the time. Also, you can't wind up the power very far on the stock NeoDET ECUs without Nistune, because the boost sensor gets in the way. Nistune allows you to push that problem much further up the dial. Do you even have the boost sensor with the engine? Without it, you are SOL and will need an aftermarket ECU (or to find a sensor somewhere, god knows where). I can't tell you what the wiring loom differences are in a 34. But what Duncan said above needs to be considered. When you say "loom", does that include the transmission loom? Because you will need to swap out the auto tranny loom for the equivalent manual loom, and get rid of the neutral/park start interlock (basically hot wire it).
    • I have had the r3c in for years now, maybe close to 7 years and it has never missed a beat, anyone can drive it. Super easy to drive around town, the hotter it gets does get a little hard but it holds the power easy as 
    • Shit thing to find eh? I guess the big issue is that whatever "fix" you do now, it might slow the rust down but won't fix it. I just wanted to add that in no way is fixing sheet metal in 3 dimensions the place to start with welding....that is a pro only job because its too hard to work out where things should be, let alone doing a clean enough job that it can look OK and still be strong too.  I needed to get a new rear quarter panel on the GTR and it took a pro weeks to get the old one off cleanly, new one on in the right place and looking somewhat like it should have with most of the previous connecting panels in place. Gluing a couple of bits of metal together with a welder in the garage is doable, but that is totally different to doing panel  replacement
×
×
  • Create New...