Jump to content
SAU Community

Misfiring After 5000rpm

nemz

By nemz,
in Engines & Forced Induction

 Share

Recommended Posts

nemz Experienced

nemz

Posted
Posted

Hey guys, my friends r32 is misfiring badly after 5000 rpm, it has iridium sparkplugs which are 6 months old so i diddnt think it was that, we put a fuel treatment in it 2 weeks ago the max octane boost one, he gave it up to 5000 rpm let it sit there and then gave it up to 6800 rpm and it was ok, but it had to be staggered or it would misfire, now after fuel treatment it still misfires. it has a 3' exhaust pod remapped ecu and hiflowed the stock turbo, BEFORE , the car would run fine on 15 psi,but now its misfiring on 10 psi (were leaving it on 10 psi). any ideas?

Link to comment
https://www.sau.com.au/forums/topic/85139-misfiring-after-5000rpm/
Share on other sites
QuickR33Melb Rising Star

QuickR33Melb

Posted
Posted

A problem that had me scratching my head a couple of years ago

It will be one of these:

1. Coil packs in the Rb20 are prone to f*ck up.

2. Most likely your spark plugs are not gapped correctly and adding octane booster puts this orange shit on them that stops them working correctly and this problem is simply amplified when the gapping is wrong.

WazR32GTSt Grand Master

WazR32GTSt

Posted
Posted

that's a generalisation...

from what i have seen, spark plugs are generally either gapped at 0.8mm or 1.1mm in their "factory" form

eg NGK coppers: BCPR6ES-11 or BCPR6ES - both the same plug, both brand new, and as you might guess one is 1.1mm gap and one is 0.8mm gap

so they might be gapped to 0.8mm or they might be 1.1mm. with the symptoms he has described i still have my balls on 1.1mm gap as the source of the problem. If hte gaps are already 0.8mm then i take my balls off the plugs and putthem on coils as the problem

either way, its not too serious

of course it could be something different altogether - i can only suggest what i think based on my personal experiences... i'm not a mechanic

cheers,

Warren

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

    • Matt Z
      SAU NSW - Archies Flame Grille Meet & Cruise to Kurnell

      By Matt Z · Posted

      Join SAU NSW for a flame-grilled feed & flame-spitting cruise! Sunday 17th August 2025 3:30PM Meeting Archies Flame Grille Sylvania Waters 4:45PM Cruise Departure 5:15PM Arrival at Cape Solander Kurnell Meet Location: Archies Flame Grille Final Destination: Cape Solander Kurnell *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.
    • Ozdavroz
      WTAC 2025

      By Ozdavroz · Posted

      Yeah good luck out there! Will be good to see a mighty GTST going harder than the GTRs
    • bcozican
      WTAC 2025

      By bcozican · Posted

      i will be there 😁
    • patrickxdf12
      Squeaking clutch/throw out bearing

      By patrickxdf12 · Posted

      Hello!  i just finished manual swaping my r34 skyline with a r33 rb20de box(RB71C)box  When the car is running it squeaks crazy loud and it was smoking from the gearbox area. The gearbox is fine it was tested. The clutch slave cylinder seems like it doesn't fully releases the clutch. I want to ask if this noise is from the throw out bearing or could it be the clutch assembly or disk att.xFliq87Gzw6kImKBVqDebXkj0fBqymk0JaYeP3_3SlM.mp4
    • RP1421
      S15 Spec R

      By RP1421 · Posted

      A few small updates since the previous post and lessons. I decided to do a little interior light upgrade on the 110. I quite like the iilumo items, even if they're a bit of a premium over other brands. You'll also note the Stedi Fogs, that will go into the S15 fog lights as I needed to match the bulbs since I got the new ones earlier. I hope they fit as the body is quite a bit longer than your normal bulb.  Annoyingly, I managed to trip the fuse, which normally wouldn't be an issue until I located the fuse. I can't say I've ever come across this. I had lucked out that someone nearby had a spare, but oddly enough Toyota dealerships seem to keep this in stock. I ordered some to keep in my stash and as luck would have it, someone else nearby tripped the same fuse so I passed on the favour.  I also did a little service on the 110 ahead of some additional work coming up. It's been annoying that Goleby's stopped carrying this particular HKS filter for the 110, so now I need to keep them on order from Japan. I also took the opportunity to install a bash plate and number plate riser. The plate riser is such a cheap but nice fix to help really tidy up the car. I'm tempted to now also replace my headlights, on this car. Both items were from Project Aero.    I also needed to replace the rear tyres on the 110, and after trying to get it aligned learnt that I need to replace some bushes in the front end, so that's next.  Closing out this update with a nicer picture as always! 
×
×
  • Create New...