Jump to content
SAU Community

Rb25 Problems

wellzy

By wellzy,
in Western Australia

 Share

Recommended Posts

wellzy Contributor

wellzy

Posted
Posted

hey everyone....

i have just recently finishd putting a RB25 into my 32 and its all running sweet except for.... sumfin which is giving me the shits

As i come on to boost and get up to about 4rpm or so the exhaust starts popping and backfiring.... simliar to as if i had a REVLIMITER "which i dont" and when this is happening im loosing power and acceleration...

ATM it only has cooler, exhaust and fuel pump "as i am a lil low on funds atm :D "

and its running stock boost.

does anyone what my problem may be... iv been told its the coilpacks and sum ppl also said its the fuel pump....

but i want more opinions b4 i do anyfin. Your help would be much appreciated

thanks

josh

Link to comment
https://www.sau.com.au/forums/topic/225335-rb25-problems/
Share on other sites
bubba Grand Master

bubba

Posted
Posted

Hesitation/stuttering would make me think fuel pump.

Popping and backfiring sounds like spark breaking down. I would start checking ignition items, plugs, coils, coil harness etc.

Is it s1 or s2 25? s1 will have a seperate igniter like 20/26, that could also be stuffed.

Does it do it everytime without fail? or only when hot? or just randomly intermittent?

Link to comment
https://www.sau.com.au/forums/topic/225335-rb25-problems/#findComment-3968604
Share on other sites
dazman Enthusiast

dazman

Posted
Posted

And enter the noob................

hows it goin, new to this, so be gentle..... he he he...

if your running standard boost, and you've added the new exhaust and front mount etc, you could be experiencing boost creap which is comon.. i found my r33 would sputter and fart at higher revs though until i put in a fuel cut defender and re gapped the plugs..

the FCD helped a fair bit but when i regapped the pluggs that made a world of difference..

the re-gapping of the plugs is probably the cheapest spot to start... i'd then suggest a run on a dyno after that and maybe fuel filter as well to determine the problem properly.. but i do understand that cost presious precious cash monies to do this.....

any ways, couple of extra ideas for ya... hope it works out and the problem gets solved...

nothing worse than chasing a bug...

Link to comment
https://www.sau.com.au/forums/topic/225335-rb25-problems/#findComment-3968641
Share on other sites
Dani Boi Grand Master

Dani Boi

Posted
Posted
Popping and backfiring sounds like spark breaking down. I would start checking ignition items, plugs, coils, coil harness etc.

+1 :D Although when I had the problem that is basically the same as wellzys I was running about 13psi but I dont think that should really make a difference. Cheapest solution to, about $3 per copper plug.

Link to comment
https://www.sau.com.au/forums/topic/225335-rb25-problems/#findComment-3968725
Share on other sites
wellzy Contributor

wellzy

Posted
  • Author
Posted

hey guys

just got bak from ovaboost in malaga.... and i was having a chat to mick and getting my powrfc fitted and tuned on thursday... but my 25 probems which i was having has wierdly stopped... after mick unplugged a brown colourd plugged which is located at the back of the throtle body (not literally on the back of the throttle body... just located behind it)

he pulled that plug out because the engine was idleing to high... and dumbass me didnt actually ask him what he pulled out

so the question i ask is does anyone know what this plug may be and why would it have stopd my first problem???

sorry to be a pain in the arse but i just need more info/opinions on this anyoing problem

thanks

Link to comment
https://www.sau.com.au/forums/topic/225335-rb25-problems/#findComment-3981757
Share on other sites
wellzy Contributor

wellzy

Posted
  • Author
Posted

YES!!!!

problem resolved.... all it F**KN was... was just a crackd spark plug. i could believe it. im glad i didnt go out and buy coilpacks

f*k... im so relieved. now powerfc in and tune and make 260HP @13psi just with cooler and xhaust and fuelpump :stupid: stocked cause iv got soooo much more to cross off the list which i will be going in

thanks for every1s help

Link to comment
https://www.sau.com.au/forums/topic/225335-rb25-problems/#findComment-3990431
Share on other sites
wellzy Contributor

wellzy

Posted
  • Author
Posted
Good to hear mate, the simplest things always cause the most grief... and yet finding them is the problem!

What colour is you car man? I work near Ovaboost, and I drive past it 2-3 times a day on test drives. I've probably seen it!

yeh just gald thats all over and i cant spend my money on what i have planned.... my 32 is silver... its the first time iv been to ovaboost in awhile but ill be dealing with them so much more when putting in my plenum and turbo n stuff because they are so helpful and reliable...

cant wait :D

Link to comment
https://www.sau.com.au/forums/topic/225335-rb25-problems/#findComment-3993095
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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kinkstaah
      R34 Diff oil

      By Kinkstaah · Posted

      Sadly I can confirm if you are actually seeking to drift, you will quite easily spin up one wheel. Even if you're going in a straight line. I am not entirely sure of the metrics/terminology here but there's only a certain amount that the helical will actually spin both wheels. I've seen it on video with my own car where two lines of smoke switch over to just one after you really get in to it. Unlike with a clutch diff where you can keep your foot planted until the car regains grip, in my experience with the helical you want to be utilizing traction control allowing LIMITED slip or lifting (partially) when you start to spin up both tyres with a Nissan helical. Which makes them pretty sub optimal for drifting duty. That said... this is probably a helical on numbers alone. Just put the Kazz in
    • GTSBoy
      Short shifter r34

      By GTSBoy · Posted

      Let's just fix the problem by f**king the rest of the gearbox.
    • GTSBoy
      R34 Diff oil

      By GTSBoy · Posted

      Unlikely, as per Greg's post. This is not helical diff behaviour unless one wheel is up off the ground. Shimming what? You don't "shim" a mechanical LSD. Probably not in the sense that you have heard of people "shimming" a diff. And the process that Nissan f**kwits call "shimming" a diff involves super-preloading a VLSD cartridge against the side of the diff to create a friction/wear point (in a place that it wasn't supposed to have one) to make the sloppy, useless, viscous diff into a hybrid viscous/mech abortion. In case it isn't clear, I consider the process to be stupid. Nike.
    • Duncan
      Short shifter r34

      By Duncan · Posted

      How much does the shifter move when the car is in gear with the engine off? If it is more than about 1cm you need to replace your shifter bush. Your shifts will just get crunchier, not faster, with a short shifter unless you also rebuild the whole box
    • drifter17a
      Short shifter r34

      By drifter17a · Posted

      I should video mine, will prob do it tomorrow    Between 1st and 3rd, you could fit another two gears. That is how loose and wobbly it is   horrible:(
×
×
  • Create New...