Jump to content
SAU Community

r33 RB25 whining

Aestysu

By Aestysu,
in Engines & Forced Induction

 Share

Recommended Posts

Aestysu Apprentice

Aestysu

Posted
Posted (edited)

r33 RB25 whining

Hey guys,

Recently bought an r33, pretty standard beside a FMIC, exhaust and a pod filter., but it is making this weird whining/metal sort of noise whenever you accelerate. I cant get a good video of it but i found someone who managed to, but dont visit the forum anymore so i cant ask them what it was!

Video is here

First turbo/import ive ever owned and my knowledge is pretty small when it comes to cars, and for the life of me i cant figure out what the sound is. Car still drives fine, boosts fine (no gauge yet but should be arriving tomorrow) but the noise is really annoying and can be heard over the engine while driving.

Any ideas? cheers

Edited by Aestysu
Link to comment
https://www.sau.com.au/forums/topic/467958-r33-rb25-whining/
Share on other sites
Aestysu Apprentice

Aestysu

Posted
  • Author
Posted
8 minutes ago, GTSBoy said:

Wait.  Is the noise independent of you twirling the steering wheel?

Nothing to do with the steering, its pretty much purely when i accelerate, and gets louder the more i give it.

Could be sitting in neutral hands out the window revving the car and it happens. 

simpletool Mentor

simpletool

Posted
Posted

Probably timing belt since that gets whiney and noisy if: 1- the belt is a gates racing or similar. 2 - is too tight. 3 - probably both. Take off the top timing belt cover (after you carefully remove the CAS) and tell us what you see. I'm guessing a blue belt.

89CAL Grand Master

89CAL

Posted
Posted (edited)

Pull ancillary belts one at a time. I'm putting money on power steering pump or alternator bearing.

Remember: Fan belt also drives water pump so don't run the car too long with this one off

Edited by 89CAL
Extra Info
Aestysu Apprentice

Aestysu

Posted
  • Author
Posted

thanks guys ill have a look hopefully tomorrow, ran into another issue gotta fix that first.

was driving, then all of a sudden lost all power, and car starts hopping. pretty much undriveable and just jumps every few seconds in bursts. it idles and revs alright in neutral, and also does reverse fine, but as soon as i use the accelerator it just hops around. thinking coils misfiring or TPS?

Aestysu Apprentice

Aestysu

Posted
  • Author
Posted

ok so didnt fix the new issue and seems to be worse now. Car turns over and starts, then pretty much instantly stalls, if i manage to start it, it doesnt want to rev past 2500, at first though it was coils/spark plugs but didnt fix it, then found the 2500 limit, so im thinking air sensor.

Cleaned out the maf, didnt do anything, let the car idle while i packed up and stalled, and still wouldnt go past 2500. going to try a new one and hopefully that fixes it otherwise im stumped.

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

    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Harness is for a s1 Rb25det, and it is engine and lower harness.  the old harness had broken off plugs and was in very rough condition/exposed wires and splices etc. it is not able to be put back on the car, I could visually inspect to see if they had rewired any pins on the ecu plug. The fuel pump definitly isn’t turning off it’s an external pump and very loud you can hear it. Will look at the other harness tonight, am also going to pull the fuel rail and watch the injectors spray, will update here with what I find. Pretty sure at this point it has to be something to do with injectors because car will fire up on starting fluid and cas is clicking the Injectors. Fuel pressure is steady 43psi 
    • Waders360
      M35 Brake caliper replacement

      By Waders360 · Posted

      Sorry. Front brake calipers
    • MBS206
      S1 rb25/s14 starting problem

      By MBS206 · Posted

      Check the injectors flow evenly, and are actually flowing what you and the ECU think they should be flowing. If it's starting up on starter fluid, you have a fuel issue. Is it possible under cranking your fuel pump is turning off?   The harness you replaced, is that the whole engine harness? Do yourself a test, and drop the old harness on and plug it into the Z32 ECU. It's possible they've wired things different. From memory S1 to S2 is different in RB25 and you may have a wrong loom
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I haven’t pulled the injectors to watch them spray yet but they are clicking from the cas and all of the spark plugs are wet with fuel. I’ve thought the cylinders were being flooded from the beginning and was hoping fuel pressure would fix it. Tonight I am going to pull the rail and watch the injectors spray. Don’t know how to test/diagnose if the plugs are firing in correct sequence but that should be a timing thing and as far as timing goes my car still has the half moon for the cas can only install it 1 way. And my mechanical timing is 100% correct I posted photos above. Confirmed with the balancer on and off. 
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I checked spark on all cylinders and they all visually have spark with the plug pulled and grounded, but plug 1 is the only one that fouled. This was a running swap that blew up and was rebuilt by a machine shop, put a new wiring specialties harness and did all gaskets, studs, and bolts while it was out.  compression is 135-150 across all cylinders. Aside from that from my understanding with the z32 ecu and maf the car should start regardless. The wiring for TPS and the dual 02 sensor/ dual knock sensor stuff shouldn’t actually stop the car from starting or even running well, (just slightly rich)  they just give fault codes. Car supposedly is supposed to start as long as you have z32 afm and ecu with the nistune base map and that’s info coming from a well known and trusted tuner who does a lot with SR/RB (Rsenthalpy). After more trouble shooting today where I’m at right now is that the cas is sending signal to the injectors they click while spinning the rotor, Fuel pressure is now set at 43psi, all cylinders have good compression and all of the plugs looked great (just wet with fuel) except for cylinder 1 which was very black (cylinder 1 has 150psi compression). all of the coils generate spark if pulled out and grounded out on the head. On the fuel pump car just pops into the exhaust. On starting fluid car will fire off. Hard to tell if all cylinders are firing off but definitley a couple. sounds like all of them but it’s only for 3-5 seconds hard to tell. 
×
×
  • Create New...