Jump to content
SAU Community

$4000 And Still Frustrated, Help!

gunns

By gunns,
in Western Australia

 Share

Recommended Posts

gunns Apprentice

gunns

Posted
Posted (edited)

Hey guys and gals,

About 9 months i got my baby, 1 of 2 dream cars, an r33 gtr (others a ford gt40... yeah i kow i can dream) :) anywho after a couple of months i found that she'd misfire at around 5k under max boost at stock, so after savng abit i took her to c-red and forked out abit for a haltech cpu and tune and it seemed to fix it, turns out it was missing the air filter plug thing and only one of my 02 sensors was working... Feeling confident i was fixed they bumped it up to 14psi on stock turbos and a remap. Dyno'd at 340 atrw:)

Noticed around a couple of months later that she was doing it agan, 5k under boost, mainly 2/3rd gear, nice jerk:( did a bit of study and found that the coilpacks can be a good cause of the problem, so i bit the bullet and got the mighty splitfres, cant go cheap on these beasts:D

Anyway today after the install drivin down row, changed from first to second, hit 5k again and to my dismay she jerked... WTF could it be, and it always seems to be at the 5k mark...

Things runnin through my mind:

- spark plug gaps

- too much boost on stock turbos

- too much exhaust gas for the stock exhaust...

Does anyone have any experience in fixing this and co0uld possibly point me in the right direction??

Edited by gunns
Link to comment
https://www.sau.com.au/forums/topic/281839-4000-and-still-frustrated-help/
Share on other sites
Nic_A31 Grand Master

Nic_A31

Posted
Posted
an r33 gtr (others a ford gt40... yeah i kow i can dream)
Feeling confident i was fixed they bumped it up to 14psi on stock turbos and a remap. Dyno'd at 340 atrw;)

Rears? or alls? :) ..... GTR .....

I'll assume you've read this.

What kind of "jerk", like missfire, or like, broken nose over the steering wheel, blood pissing out everywhere, and call your mother because tears are running down your face ??

Could be a bad alty (only ever had one in all my cars, started hessitating occasionally a higher rpms, then more frequently, then at lower rpms, then finally gave in)

Could be alot of things, just depends on what exactly is happening at that 5k RPM mark, could be crank angle sensor, air, fuel, spark, ECU

gunns Apprentice

gunns

Posted
  • Author
Posted

ah at the rears, c-red have only got a rwd dyno.

Haha jerk as in missfire, bout a split second of nothing then it picks up again and keeps goin good right up to 8k with no probs. i have yet to have any problems below or above 5k, seems to be very specific. i get the spark plugs changed every service, 5-10k's so i can cross them off. i just read another thread similar to this (gotta love the search functon) where they were mentionin the wiring loom. I might give the mechs a ring tomoz and see what they think, but i think a loom might be the next on the hit list.

Ta for the quick reply

Nic_A31 Grand Master

Nic_A31

Posted
Posted

Wiring looms from the ignitor box to the coil packs is a common fault, because they're inside the valley cover and prone to heat. They usually run OK until you try to move them and they go crunch, then they're f**ked. Same with the ignitor box itself, sitting on top of the cover doesnt help a great deal, alot of people mount them onto the firewall.

Couldnt find any wreckers around my work in Welshpool that had any for me because theyre such a common f**kup, you can order them from JustJap, SlidingPerformance, maybe eBay, etc... or let a mechanic stretch your ass for it.

gunns Apprentice

gunns

Posted
  • Author
Posted

Wicked as, so from the sounds of it, wiring loom or ignitor box, or cas if im unlucky. im not mech savy so unforunatley so wont be able to checkthis for myself, sounds like ass stratching FTL :-(

I guess itwas a bit noob to think that going splitfires woud the ducks nuts and just magcally fix it

Nic_A31 Grand Master

Nic_A31

Posted
Posted

Im just over in Swan View if you ever need a helping hand mate.

Splitfires might be a setback now, but when the problem is fixed, you'll notice a difference for sure.

Ignitor box will be cheap as, wreckers might have an ignition loom (they do, just as soon as they arrive they sometimes sell out quickly), and theyre pretty cheap too.

Dsturbd Grand Master

Dsturbd

Posted
Posted
Does anyone have any experience in fixing this and co0uld possibly point me in the right direction??

Fixing what ?? Most replys here are just wild stab in the dark .. go look in the workshop thread and visit the 1 closest to you

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

    • TurboTapin
      Why am I hitting a power wall with my stroked RB25?

      By TurboTapin · Posted

      I couldn't agree more. I should have started from the get-go with a NEO or solid bucket conversion. I started looking into converting over to solid lifters yesterday. Now for some reason I was always under the impression that when using the Tomei solid lifter conversion, you would also require new valves (Longer or shorter stems, I can't remember which).  But I see no mention of this on any of the Tomei documentation. It just states I need the Tomei solid buckets, solid lifter cams and upgraded springs. As my head is already built, all I would need is another set of 1000$ Kelford cams, 500$ buckets and about 4H hours of my time installing and I'm off to the races!?!? There's no way it's that simple, I must me missing something? 
    • foney
      Cheap Gtr For Sale

      By foney · Posted

      BRUH, one of the biggest mistakes of my life..... and i've had plenty ;[)
    • Kapr
      "Cheap" bolt on turbo on RB25DET NEO

      By Kapr · Posted

      @Murray_Calavera iam just considering options 🙂 of course it is very expensive so that why i ask here 🙂  @joshuaho96 I looked at that GCG hybrid(i remember looking at it few weeks before) So this is "that" hybrid where i send them my turbo and they upgrade the inside to Garrett stuff and then they send it back. It cost around 1200-1300 USD which is FAR cheaper than the HKS and it is what iam looking for(i just do not have experience like this...to send something off to "upgrade" ) @tylink720 that is like 150 USD turbo no? 😄 I dont think i have the "ease on my mind" with this kind of turbo. I just put over 7000k USD to "LINK" up my engine...dont want to blow it up with cheap turbo 😄     EDIT: https://www.cj-motor.com/gcg-turbo-charger-for-nissan-rb20det-rb25det-high?srsltid=AfmBOooVeOZ6CZ6r1AIv5m-KPaa6BvudIPJTY8LW78khkd-gQlsaCht9 I looked at this and it seems ok? It is that CGC hybrid and it costs around 1250 USD (with back shipping). Do any of you have experience with this hybrid on NEO turbo? I quickly look thru the forum/web and it seems very good.
    • Rezz
      First time Skyline owner

      By Rezz · Posted

      Echo the awesome sentiment 👍 Definitely a car worth saving. Looking forward to seeing updates as well. 
    • Matt Z
      SAU NSW - Chickos Cruise

      By Matt Z · Posted

      Scenic roads, stunning skylines, and Chickos to finish it off! Join SAU NSW as we cruise through the Royal National Park and along Lawrence Hargrave Drive to Figtree! Sunday 26th October 2025 4:30PM Meeting Waterfall Station Parking 5:00PM Cruise Departure Royal National Park > Lawrence Hargrave Dr > Memorial Dr > Sid Parrish Park 6:15PM Arrival at Sid Parrish Park Figtree Meet Location: Waterfall Station Parking Final Destination: Sid Parrish Park RSVP: https://forms.gle/E4s5SiRKQfDdypky8 *Disclaimer* There will be a lead and follow car so no one should get lost. If you would like to attend or bring others along please put your name down and a +1 as numbers will be needed prior! This is NOT a race and we will all be adhering to all road rules. If this is what you want please come to one of our many track days. This is an official SAU:NSW event and will be run under a CAMS permit. One of the things that really sets our club apart is our commitment to being true enthusiasts. When on normal roads we strive to maintain good relations with the authorities as well as the public in general. When attending one of Skylines Australia NSW events please try to: • Be aware of surrounding environment and act accordingly. • Drive courteously on the state’s roads as a true enthusiast should. • Understand how important it is to maintain the good name of SAU NSW and thus, treat others accordingly. • Any misbehavior will not be tolerated and you will be asked to leave.
×
×
  • Create New...