Jump to content
SAU Community

Missfire Boost@4500-5500 RPM - The Answer! (for me at least!)


Recommended Posts

just put in the iriway 7 spark plugs, still the same, im all out of ideas, i inspected the coilpacks so many times, no burn marks or melting or loose components etc.

any ideas people?

Can a blocked fuel filter result in the car missing/spluttering as described?

If it is totally blocked it could cause it to run very lean and misfire, it is fairly uncommon though.

Edited by Rolls

I had my engine rebuilt for my 32 GTR a few years ago and after the run in I found I wasn't making full boost and was braking down. I found my stock IC plumbing was piping off and then re sealing (took me a while to find that one) then it ran good for a few years and then for a while I had a problem of it breaking down under boost, poping and farting, miss firing like a mofo!! I spent almost every few months changing spark plugs and checking AFM's IC piping. Then I decided to buy new coil packs. Oh man what a difference!!! Red-lining holding boost no worries now. Went with the splitfire. Best investment!

  • 3 weeks later...

As always the trusty skylines community has helped resolve my missfire issue..

Symptom:

Got a service completed, engine bay cleaned and car started to develop a missfire under load through the rev range starting at 2,500 - 3,500 then 4,500 - 5,500.. Sounds like a machine gun popping..

Swapped out spark plugs which appeared to be quite old and coil pack completely failed when placed back.

Resolution:

Looked at a number of posts and ended up buying a set of 6 yellowjackets rather then splitfires from Performance Wise, arrived in 3 days - great service from Paul..

Put them in, car is performing as normal, no missfire!

Note: Car would idle fine and would be ok when gradually coming onto boost, only when wide open throttle and under load would it missfire..

http://www.performance-wise.com

  • 6 months later...

As always the trusty skylines community has helped resolve my missfire issue..

Symptom:

Got a service completed, engine bay cleaned and car started to develop a missfire under load through the rev range starting at 2,500 - 3,500 then 4,500 - 5,500.. Sounds like a machine gun popping..

Swapped out spark plugs which appeared to be quite old and coil pack completely failed when placed back.

Resolution:

Looked at a number of posts and ended up buying a set of 6 yellowjackets rather then splitfires from Performance Wise, arrived in 3 days - great service from Paul..

Put them in, car is performing as normal, no missfire!

Note: Car would idle fine and would be ok when gradually coming onto boost, only when wide open throttle and under load would it missfire..

http://www.performance-wise.com

That sounds exactly like my issue, but mine isnt that severe, just jerky when wide open trottle under load. I will try my mates coilpacks and hopefully that fixes the issue.

Cheers mate

  • 2 weeks later...

Have a RB25DET with stock coilpacks. Always had a miss fire on idle even with copper or iridium plugs. Car made 291rwhp on stock turbo.

Then I got a GT3082, car makes a 351rwhp. But it has a horrendous missfire on full load, boost @18psi.

So I took my coilpacks out to silicone/tape them. And saw #6's coilpack and plug were burnt out. Thoughts?

1.jpg

Where is that coil plugged in? :sick:

  • 4 weeks later...

Anyone tried these coil packs: http://www.ebay.com.au/itm/Performance-Coil-Packs-RB20-RB25-RB26-R32-R33-GTR-/110462393656

Chasing an intermittent miss and wouldn't mind ruling out the coil packs but $600 on the Spitfire ones seems like overkill (fairly stock R32 GT-R).

They look like Superspark knockoffs. Try yellow jackets: http://www.ebay.com.au/itm/YELLOW-JACKETS-COIL-PACKS-SKYLINE-R32-RB20DET-S1-R33-RB25DET-GTST-GTR-RB26DETT-/170868197763?pt=AU_Car_Parts_Accessories&hash=item27c889c983

I bought mine off performance wise around 3.5 yrs ago and they are still going as strong as the day I installed them. Neva skipped a spark:)

You can also get them from their website for a little cheaper - http://performance-wise.com/userimages/procart28.htm

  • 2 weeks later...

Why didn't I read this this morning? Had my coils out chasing a break down in ignition and found my plugs were gapped really badly. Also I don't think the plugs had ever been changed going by how tight all the bolts were including spark plugs.

My 34 was running around 13psi on standard everything but when reved hard would go "b b b b b b" does this sound like coil breakdown or miss firing? It's an auto and it's previously only ever done right before changing gear but was doing it all day Sunday.

Edited by RSFOURDayz

Thanks for the tip. I'll look into the Yellow Jackets (although trying the cheap ones is tempting).

Edited by BuuBox
  • 3 weeks later...
  • 5 months later...

Why didn't I read this this morning? Had my coils out chasing a break down in ignition and found my plugs were gapped really badly. Also I don't think the plugs had ever been changed going by how tight all the bolts were including spark plugs.

My 34 was running around 13psi on standard everything but when reved hard would go "b b b b b b" does this sound like coil breakdown or miss firing? It's an auto and it's previously only ever done right before changing gear but was doing it all day Sunday.

missfiring, had the same issues, checked the coil, taped it, replaced sparkies, all good

dont forget to check the coil plugs

  • 7 months later...

that sound just like the problem I've got with my r33 on closer look also found we were getting a voltage drop

at alternator replacing with RH9 hyper Alternator 130A have been told we could be putting to much load on

alternator with extra electronics, will try your fix for coils tho before ordering new coils

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

Hows it goin guys
Im new to this forum had for a while haven't been on it as much
I got a few questions if any one can help...

I duno whether i have a boost leak or not
my 32 gtst is spitting some times black smoke
and i always have low revs
some time when break car will switch off
and last night went out car switch off never came back on
thought it was the batt
but narhh
i think it may or may not be the plugs
i got a general understanding on motors ut not 100 percent
dnt want to do something to make it worse...
if anyone can help...
:(

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



  • Latest Posts

    • ok so if i wanted to go 18's i would go for 8's  in front 30+ or 32+ off set at front and the back 9 would be ok? what offset should i aim for.. then can i do some  hunting for wheel rim choices..    If i get this - will this fit all around: Size: 18 x 8.5 +37 - n what tyres size tyre should i get for front n back?  
    • Absolute f*cking nightmare. I had to take breaks constantly, and I was always pissed off when I got home. The line split in Italy on day 2 (we drove from the Netherlands), lol. Driving any narrow European town was... well, sh*t.   Appreciate it man. Here, I'll just drop a favourite from the load I took on Saturday.   I'll update here when things happen with the car, the thing is, with stock power and almost everything chassis-wise taken care of, there really are no problems. 268,000kms now and counting.  
    • Ah! I actually managed to snag a lightly used set.... that aren't so suitable for me right now. They don't work on a GTT without some cutting or creative heat moulding. I thought about reselling them myself cause I didn't want to murder them, but it looks like I'm probably going to attempt to murder them/melt them because I may as well. @GTSBoy @PranK can somebody close this thread?
    • Hey mate,  I have a set, one is slightly damaged but wont be noticable once installed.  Shoot me a message if your still after them 
    • I couldn't wait But, the black constant tension hose clamps were too thick and there wasn't enough clearance at the T/B and I couldn't get it to seat properly, so I had use a silver one there I also added some 3" silicone over the alloy bit that goes through to hole on the radiator support as it looked like it was sitting on the edge of the hole in the radiator support, I never noticed a rattle or anything, but there was a witness mark It is basicly done, and I can live with the silver hose clamp at the T/B, I will get a black clamp for the head vent though where it is attached to the bulkhead fitting  It never stops...LOL, only issue now with the shock tower brace is it slightly touches the under bonnet liner now, if I leave it it will either wear some paint off the brace where it touches, or damage the liner, so I removed the liner to see what I have to work with, with the liner removed I have about 20mm of clearance, but sadly the middle part of the underside of the bonnet is only dusted with paint and looks crap, so I cannot have that, but.... as I have a roll of Carbuilders premium under bonnet insulation in the garage laying around that is only 5.5mm thick (we were going to use it on the boys Patrol, but he crashed the front of it a few months and it was written off, hence why he now drives my old Honda Accord Euro), I'll use the OEM liner as a template and get the Carbuilders stuff fitted up to cover that dusted paint up
×
×
  • Create New...