Jump to content
SAU Community

Recommended Posts

First problem I've had with my Stag since I bought it 18 months ago...

at idle in P or whether in gear with brake on, it mis-fires intermitantly and smells strongly of fuel.. havent noticed any issues while driving

i filled up fuel on tuesday and reset the trip meter, i've done 200k's and used half a tank already..

thinking afm/oxygen sensor/coil packs? anyone had any similar problems and might be able to point me in the right direction? its just a dead stock standard rb25 neo.

thanks.

Link to comment
https://www.sau.com.au/forums/topic/313867-s2-rs-running-crap/
Share on other sites

id b susing plugs, and coilpacks for any short out/grounding around the edge of the cup that sits on the top of the plug.. it will be white dots... if so i believe you can put electrical tape inside to stop this. how olds the O2 sensor? and might aswell clean the afm while ur there... c how this goes... wat gap on ur plugs u using?

lol, 200kms half tank, havent done that in a while ;)

hahaha exactly what i was thinking lol, i'm happy if i see 200km to half a tank.

Silhouette31, firstly start with a fresh set of spark plugs. then a quick and easy one to do is clean the AFM with some contact cleaner(carb cleaner). if its still not right then probably one of the easy ones to fault find on is O2 sensor, if your handy with a multimeter just probe the signal output, or if you have a consult cable or know anyone that does just use that. look for a "lazy" cycle on the sensor, it should quickly bounce back and forwards from 0-1v. if its lagging or just stuck, it will cause incorrect fuel correction on the fuel maps making it run either lean or rich.

^^^^^ how do u find this with consult? i just changed mine and wouldnt mind checking if its all legit... im still popping a flame with full boost gear changed so im clearly not leaning off at that end :blush:

what consult program are you using? Ecutalk is a good one, just connect up to the ecu, tick the O2 Sensor box from the available sensors/readings, and the choose display gauges. you will see an O2 sensor voltage gauge ;)

its got brand new platinum plugs 4000k's ago when i did a major service.. gaps are standard as everything on the motor is 100% standard including airbox etc.

i used to get 250-300km's to half a tank easy. its not running rough all the time, only slightly missing at idle and when it does it has a rich fuel smell

sorry to be annoying but how do i test the o2 sensor? i have a multimeter and all, what pins do i connect to and what readings should i get? resistance or volts?

might try the afm clean though, ive never touched it.

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

    • Jack the back of the car up, pull that wheel off, pull that sensor out, and put a bore scope into the hole to inspect the outer casing, see if anything looks damaged before you pull the whole thing apart.
    • Ergh... So I pulled the speed sensor out again and the tip was shiny so I think it's rubbing the bearing. The bearing contains the magnets for the speed sensor so I think when the first sensor broke it damaged the magnet ring on the bearing.  This is just a Google image, but there is a hole going to the bearing. So when the tip broke off the old sensor I'm guessing it fouled the bearing... As the magnet is only protected by a plastic cover it would be easy to damage it. So I guess I'm doing a bearing again.   
    • My thinking is that if the O2 sensor is shot then your entire above described experience is pure placebo.
    • Here is the mess that I made. That filler there was successful in filling dents in that area. But in the middle area. I can feel dents. And I've gone ocer it multiple times with filler. And the filler is no longer there because i accidently sanded it away. I've chased my tail on this job but this is something else lol. So I'm gonna attempt filler one more time and if it doesn't work I'll just high fill primer the door and see where the issues are because guidecoat is of no use atm.
    • Ok, so I think I sort of figured out where I went wrong. So I definitely overthinked it, and I over sanded, which is probably a large part of the problem. to fix it, I ended up tapping some spots that were likely to be high, made them low, filled them in, and I tackled small sections at a time, and it feels a lot better.    I think what confused me as well is you have the bare metal, and some spots darker and some are lighter, and when I run my finger across it, it' would feel like it's a low spot, but I think it's just a transition in different texture from metal to body filler.    When your finger's sliding on the body filler, and crosses over to the bare metal, going back and forth, it feels like it's a low spot. So I kept putting filler there and sanding, but I think it was just a transition in texture, nothing to do with the low or high spot. But the panel's feels a lot better, and I'm just going to end up priming it, and then I'll block it after with guide coat.   Ended up wasting just about all of my filler on this damn door lol  
×
×
  • Create New...