Jump to content
SAU Community

Rough Idle...out Of Ideas?

Ty1

By Ty1,
in Queensland

 Share

Recommended Posts

Ty1 Experienced

Ty1

Posted
Posted

Hey all! for the past couple months I've been experiencing rough idle only on start up. It's weird cos it only does it on a warm start, say if I were to turn off the car then start it up 20 minutes later. The idle fluctuates so much to the point of the car almost stalling on me which is driving me crazy :huh: but as soon as I take off and go for a drive its fine. I'll go through and list everything that I've done to try solve the problem.

. cleaned aac valve

. swapped afm with a known working one

. replaced o2 sensor

. checked spark plugs and coil packs

. replaced almost every hose in the damn car so it can't possibly be a hose

. took off my atmo bov and put the stock one back on.

. adjusted the idle (it sits at about 750-800rpm but still has the same problem)

One of the only things I haven't replaced is the fuel pump or injectors. Could it have something to do with the fuel delivery? If someone has experienced this before please help me lol

Link to comment
https://www.sau.com.au/forums/topic/283450-rough-idleout-of-ideas/
Share on other sites
AlexR34 Proficient

AlexR34

Posted
Posted

My guess would be that one of your injectors is sticking. Maybe run some injector cleaner through your car you can get a bottle from super cheap auto for 5 dollars. I don't think its the pump because if it was the pump you car probably would stall. Could also be the fuel filter. I've also heard of similar issue with people who have a leak in their manifolds, but I don't think this your problem since it goes away when the car warms up. I'd pull out the injectors and give them a good clean.

Ty1 Experienced

Ty1

Posted
  • Author
Posted
My guess would be that one of your injectors is sticking. Maybe run some injector cleaner through your car you can get a bottle from super cheap auto for 5 dollars. I don't think its the pump because if it was the pump you car probably would stall. Could also be the fuel filter. I've also heard of similar issue with people who have a leak in their manifolds, but I don't think this your problem since it goes away when the car warms up. I'd pull out the injectors and give them a good clean.

It shouldn't be the fuel filter as I replaced that about a month ago. But I'll try get the injectors cleaned. Thanks for that man!

GTS R33 Community Regular

GTS R33

Posted
Posted

my car does the same thing. i was presuming it is a sensor that isnt working until a certain heat. i notice it happens once the autochoke turns off. as far as i know mine has stock ecu. only mods are filter, exhaust, intercooler, t piece. i have used injector cleaners. cleaned maf.

Ty1 Experienced

Ty1

Posted
  • Author
Posted

Seems as though a bottle of injector cleaner has fixed my idle issues! :D Just before i filled up today I added half a bottle of the cleaner in and filled up with mobil 8000 instead of the usual vortex98 that I run my car with. So i'm not too sure if it was a combination of the cleaner and different fuel but it's fixed my problem.

AlexR34 Proficient

AlexR34

Posted
Posted
Seems as though a bottle of injector cleaner has fixed my idle issues! :D Just before i filled up today I added half a bottle of the cleaner in and filled up with mobil 8000 instead of the usual vortex98 that I run my car with. So i'm not too sure if it was a combination of the cleaner and different fuel but it's fixed my problem.

Yeah looks like your injectors were getting a bit dirty and sticky.

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

    • joshuaho96
      Speed Sensor replacement

      By joshuaho96 · Posted

      Drain it. I got official Matic D but you can get whatever is listed as Matic D compatible.
    • QB6SAGR
      Tein Circuit Master- rebuild worth it?

      By QB6SAGR · Posted

      Thanks guys,  Yeah I should at least have them dynoed, at least then I know what I've got as a starting point.  The springs on these are hard as rocks. I vaguely remember Russman saying he was going to sell the shocks to me with the rocks fitted, as he was keeping the softer springs for his new setup.  I didn't click at the time but of course that was to let me know the shock/spring wouldn't be matched.  I also remember pricing up new springs around 2014-15, but, house, money etc. it never happened. So that was another reason to have them rebuilt. I have rebuilt the forks on many motorcycles so I think I could handle the seals on these easily enough, but getting the valving right would be a rabbit hole I cbf exploring.  Duncan, interesting to hear RP was tuning these back then. I might give them a call.  In the mean time I have been busy fitting sway bars. The Whiteline rear sway bar I purchased 15 years ago finally got fitted, along with the Whiteline front bar that showed up last week. Just waiting on new links for the front sway bar to finish that off.  And my spare set of advan AVS VS5's should be back from the powder coaters in a Pearl White finish sometime this week, with a set of Hankook RS4's lined up for fitting.  And then I just have all the suspension bushes to do. A comprehensive kit is on the way... Lots to do before the Ararat hill climb. Cheers guys 🍻   
    • funkymonkey
      Howdy Y'all

      By funkymonkey · Posted

      Nice car! I’m glad folks in the US have gotten past the FnF and are buying real cool cars like the 260RS I was with a bunch of mates in Portland about a year ago and spotted a green Stagea (just a regular 2.5T AWD) parked about 2 blocks away and they were like “a what?” So I made a bet with them for a round of beers and said “ok one of you run down there and tell me if the steering wheel is on the correct side” 5 mins later the American comes trudging back up the hill and goes “he’s right guys. Ok what beer do you want?”
    • Dose Pipe Sutututu
      Starting again

      By Dose Pipe Sutututu · Posted

      Should replace OR drop the tank, give it's good clean. Might be worth replacing that entire fuel level/pump/cradle thing with this: https://frenchysperformancegarage.com/products/fpg-s13-180sx-r32gtst-single-pump-hanger-kit-billet-hat-6-v3-fpg-089?gQT=2  
    • R33_Guy
      Speed Sensor replacement

      By R33_Guy · Posted

      Thank you so much for the help
×
×
  • Create New...