Jump to content
SAU Community

Recommended Posts

Hey all.. ive done some searching but couldn't find anthing...

I have a rb25 series 2

Nistune

exhaust and cooler

new coils and plugs

the car "stumbles" at 3500rpm...and the boosts fine to 10psi in all gears.... its gets worse once its warm... im unable to boost it without it popping and farten.

any ideas guys???

Link to comment
https://www.sau.com.au/forums/topic/445271-bloody-rb25/
Share on other sites

It had splitfires in her. Then changed to some ebay ones..they are red.

brand new z32 afm has been installed

ive put in 3 new sets of plugs... 7es ones (colder type plug)

Also had the cooler piping fixed up last week as well. . It was fouling the swaybars etc

Also cleaned the iac valve

checked the injectors and had new orings installed

any advice would be great.... this car is doing my head in

Link to comment
https://www.sau.com.au/forums/topic/445271-bloody-rb25/#findComment-7331100
Share on other sites

So car hammers when cold? And you hammer it when cold? That's dumb.

Why write any advice would be great after receiving heaps of advice?

Should we take that as you are rejecting advice given up untill that point?

And to clarify. I suggested the three things as they are all likely causes causes of your car running like it does. You are welcome to ignore them but I would suggest pressure testing your inlet.

Link to comment
https://www.sau.com.au/forums/topic/445271-bloody-rb25/#findComment-7331129
Share on other sites

Ben, I actually thought the same as you....but I then realised that just maybe, giving a little credit to the OP, that mentioning that it goes hard when cold but has a bigger problem when hot is at least a valid piece of information.

I mean, if it were me being the OP I would have felt the need to tell people that I don't normally punt it when cold, just to make sure they realise I'm not an idiot but only did it for diagnostic purposes, but obviously some people don't feel the need to allay suspicion in such circumstances.

Link to comment
https://www.sau.com.au/forums/topic/445271-bloody-rb25/#findComment-7331226
Share on other sites

Im not trying to start an argument. .. but picking up on " it hammers when cold" and telling me im dumb.. to me is a key peice of information to help diagnosis

as for writing "any advice with a reason for your advice" .. anyone can rattle of parts of a car afm, gearbox, plugs... but why do you think its that part will help me alot more

Link to comment
https://www.sau.com.au/forums/topic/445271-bloody-rb25/#findComment-7331306
Share on other sites

Im not trying to start an argument. .. but picking up on " it hammers when cold" and telling me im dumb.. to me is a key peice of information to help diagnosis

as for writing "any advice with a reason for your advice" .. anyone can rattle of parts of a car afm, gearbox, plugs... but why do you think its that part will help me alot more

I didn't say you are dumb.

I said hammering a cold engine is dumb.

I think it's a boost leak or dirty afm because they make the car have the symptoms you are suggesting

I also couldn't be stuffed writing along response explaining my reasons initially.

Just like you didn't bother to write a post that explains your problem and the car history fully.

Link to comment
https://www.sau.com.au/forums/topic/445271-bloody-rb25/#findComment-7331332
Share on other sites

It had splitfires in her. Then changed to some ebay ones..they are red.

brand new z32 afm has been installed

ive put in 3 new sets of plugs... 7es ones (colder type plug)

Also had the cooler piping fixed up last week as well. . It was fouling the swaybars etc

Also cleaned the iac valve

checked the injectors and had new orings installed

any advice would be great.... this car is doing my head in

Might want to check the compression and timing, then put the splitfires back in and check for leaks with carby cleaner. Injector O-rings lubed?

We are assuming the setup was tuned before not just someone elses nistune from ebay with an Ebay special turbo bolted on ?

Edited by AngryRB
Link to comment
https://www.sau.com.au/forums/topic/445271-bloody-rb25/#findComment-7332335
Share on other sites

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

    • I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
    • I assume clearances were all a-okay?
×
×
  • Create New...