Jump to content
SAU Community

Recommended Posts

hey guys

tonight whilst driving my 32 i noticed that once it comes on boost it starts hesitating/ misfiring abit and a cloud of black smoke out the back. I put $20 of BP 98 in it before hand and thats when i started noticing it and thats the first time it happened, the night before i went on the Antilag cruise and again put fuel in before hand and it had no problems came on power fine and smooth.

the car has splitfire coil packs with standard BOSCH plugs, forward facing plenum with saard injectors and a 35R turbo with 44mm gate

im thinking it could be a bad batch of fuel?? possible coil pack?? and maybe the standard plugs have given up on life and thats causing the drama

it idles fine, drives fine with no misfire but as soon as it creeps up to about 4-4.5rpm as the power comes on thats when it starts to hesitate and misfire, sometimes its not bad then some other times its pretty bad any suggestions????

cheers

Link to comment
https://www.sau.com.au/forums/topic/398852-32-misfiring-hesitating/
Share on other sites

Sounds like plugs or coils. When there is a lot of fuel/air going in it blows out the spark. Either gap is too large on the plugs or coils aren't making strong enough spark or spark is going somewhere else instead of to the plugs. If the gap is too large I.e. works ok with smaller gap plugs, then its likely the coils are getting old. Smaller gap is just a temp fix for the inevitable.

well i was gonna put new platinum plugs in and take it for a spin if no real change is there was gonna swap splitfires with my mrs's 32 and see if that makes a change then i can cross a few possible causes off my list

well i had a set of platinums sitting around so i put them in and drove it the hesitation is gone but still has abit of a misfire i looked inside each coil pack when i changed plugs and cylinder 1 coil had a white powdery resedue and the little coil spring inside is like gone and all other coils are clean and have no pwdery stuff in it, and the top of the old plug was powdery and all crapped up, so i have a feeling its a combination of shit plugs which are failing when hot? and a crapped out cylinder one coil pack?

ok so i swapped a whole coil pack assembly for all 6 cylinders and the harness from my mrs's car to mine and took it for a spin, still the same result, like a popping, misfiring sound, doesnt really seem to miss i think i can rule out its a coilpack if mine runs the same with 2 different harnesses, i even swapped the dud looking one with the white shit in it to her car and took hers for a drive and hers ran nicely no miss or hesitation, im going down the lines that the pooping/ miss sound is maybe from the screamer pipe under abit of heavy acceleration??, it doesnt do it all the time when on boost just sometimes through the rev range, might even pay to get plugs with a .8mm gap??

cant swap ignitor pack, i have a series 2 rb25 and the ignitor packs are built into the coil packs and ive swapped all of them and i still got the same result, maybe i need to get plugs with the right gap, whats weird is it ran fine before for ages then it started to play up, i swapped plugs with new platinums, it got alot better but not perfect

  • 2 weeks later...
  • 5 weeks later...

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

    • Hi GTSBoy, Excuse my ignorance but what does a "Bad" Knee point mean ? 
    • HFM BM57 has a "bad" knee point, IIRC. It's not the same thing as the later R chassis MC.
    • The ATTESSA is functionally identical to R34; there were a bunch of JDM models that continued ATTESSA including Fuga/Q70, Skyline/Q50, Cima etc as an option. All with Auto only and I think mostly for snow regions. AFAIK there were no AWD VR30DDTT sold in Australia - it is on my to do list to check regs for racing a LHD car in Targa/ATR/AASA/CAMS events because if I can get the auto to work it would be interesting to run a 4wd car The Ecuteck TCM tuning is the same model as their ECU tuning, they already have it for R35 and Dose's favourite, BMW. You buy "points" to allow your computer to be tuned, buy either a bluetooth (phone app) or bluetooth+USB+Key (phone and PC) dongle, and pay for a tune that will be locked to your tuner ( ). You can also access the tuning software yourself but 1. it is mega expensive and 2. these computers have a billion parameters that intersect, so how could you ever spend enough time on it to get a decent result.
    • Or, is it a case of what it is like owning an R series Skyline? NFI what the previous owner has done or fiddled with... Ha ha ha After reading through this thread, I went on a bit of a research about the Q50/Q60. Now I'm quite intrigued by them! Is the AWD in them more like a WRX where it's always AWD, or is it more like the ATTESSA in the GTRs? By the sound of this TCU tuning, this sounds like a case of someone has made some real software for it, and you just need the right piece of hardware, and then you license that specific vehicle/TCU. Or is this a case of the software will be really expensive so only a few tuners have it, and you still have to pay a license per vehicle?
    • By popular demand.. it was a coil. Got my hands on 1 new OEM coil, replaced with the one that made the less noise difference when I unplugged it while the car was running and started the car up. No stutter and the engine light was gone. I guess I’ll buy the other 5 they have lol
×
×
  • Create New...