Jump to content
SAU Community

Power loss in my rb25de

nismo_GTST

By nismo_GTST,
in Engines & Forced Induction

 Share

Recommended Posts

nismo_GTST Rising Star

nismo_GTST

Posted
Posted

hey guys,

i've got an r33 and last week the car lost so much power. when i put the foot all the way down, it just revs and basically goes nowhere. I've tried pumping it with injector cleaner, fuel system cleaner but nothing seems to work. If anybody has any ideas as to what may be the problem, could you please let me know.

Cheers,

Antony.

Link to comment
https://www.sau.com.au/forums/topic/46282-power-loss-in-my-rb25de/
Share on other sites
MR R33 Experienced

MR R33

Posted
Posted

its something to do with the clutch in the auto or it could be the gearbox i had the same problem with mine but it was a manual as soon as it got to 4 rpm it would go straight to redline without me moving and it was because the clutch was worn and it was slipping have it checked by a mechanic

  • 2 weeks later...
ANut Collaborator

ANut

Posted
Posted

i have the same problem with my car. Its a 92' r32 GTS RB20DE auto. Did u find out th eproblem and how to fix it? very keen on the solution, as i am a Noob. it is my first car, and its been this way since i got it.

although a bit of an increase in power as the engine warms up.

Also, there seems to be a new engine noise which has just recently come up. somewhere between 2-3000rpm theres a vibrating noise, which sounds like somethings loose.

Any tips on what it is or what i should do? mind you i am a Noob.

  • 3 weeks later...
nismo_GTST Rising Star

nismo_GTST

Posted
  • Author
Posted

I have taken it to a few mechanics but unfortunatly have had no luck. No one seems to know what the hell is goin on. Its got nothing to to with the gearbox, apparently, i thought it may be the coils, but its not them, the next thing thats gonna be looked at is the cat to see if its blocked or not. Either way i'll keep you guys posted. If any body out there knows of a good mechanic who knows what they are on about with skylines and are in melbourne, could you please let me know.

Cheers,

Antony

PS. Anut, my car is exactly the same, increases in power as it warms up, sometimes it even goes back to being normal, but as soon as it gets cold, it starts all over again, and i do get that same noise around that rev range. I am trying to get to the bottom of this.

nismo_GTST Rising Star

nismo_GTST

Posted
  • Author
Posted

ill have the afm checked out, but i was told that if it was the afm, there would be heaps of smoke coming out of the exhuast, as for the fuel, its using heaps more, im pushing it if i can get somewhere between 250 & 300 kms from a tank using optimax. I would normally get somewhere between 450 & 500 kms

RTHRTY3 Rising Star

RTHRTY3

Posted
Posted
i have the same problem with my car. Its a 92' r32 GTS RB20DE auto. Did u find out th eproblem and how to fix it? very keen on the solution, as i am a Noob. it is my first car, and its been this way since i got it.

although a bit of an increase in power as the engine warms up.

Also, there seems to be a new engine noise which has just recently come up. somewhere between 2-3000rpm theres a vibrating noise, which sounds like somethings loose.

Any tips on what it is or what i should do? mind you i am a Noob.

Does yours make like a loud sucking noise at cold start between 2000-3000rpm BOTH when accelarating and just after when stepping off the gas? Mine does this and i've got the stock air filter and air box still, no pods (i know pod does this). And it stops doing it after the car is warmed up like at normal temp. Can there be an AFM problem, like its on its way out?

nismo_GTS keep us posted wat happen to urs ok.

Cheers

nismo_GTST Rising Star

nismo_GTST

Posted
  • Author
Posted

Mine makes that noise but i have a pod, i have managed to book the car in for monday, the mechanic reckons he's gonna need the whole day to find out whats wrong, we'll see how we go. I'll let you guys know whats goin on whatever happens.

Cheers.

geordie Proficient

geordie

Posted
Posted

The exhaust will make a snappy vibrating noise in N/A's and it has been layed down to a charicteristic of the engine, something along the lines of the cams, should be most prominaent around 2500-2900ish.

I had a problem with mine a little while back where the engine would cut out and react like it was hitting redline fuel cut, but would do it as low as 3500rpm, esp the hotter the engine became, this turned out to be the exhaust cam sensor. Which is a mitsubishi part (Mitsu sabotage!!) i wasnt happy because the very same time it stop working, was the same time my car was sitting on the dyno, i was very pissed off. My car hit top of 96kw @ wheels, but due to the sensor cutting out at 4000rpm, and anyone with an N/A knows this is where the real power only starts to build up, i had another good 2500-2800 rpm left to pump out my power figure, i was not a happy boy.

RTHRTY3 Rising Star

RTHRTY3

Posted
Posted
Mine makes that noise but i have a pod, i have managed to book the car in for monday, the mechanic reckons he's gonna need the whole day to find out whats wrong, we'll see how we go. I'll let you guys know whats goin on whatever happens.

Cheers.

Hay man did u find out wat the problem is?

:D

  • 2 weeks later...
nismo_GTST Rising Star

nismo_GTST

Posted
  • Author
Posted

Hey guys. This is becoming really frustrating. The last guy i took it to doesnt have any idea whats goin on. He suspected that it might be the cat thats blocked but after putting it up on the hoist and checking out the temperature difference from one side of the cat to the other wich was only a few degrees, he said its in good nick. I am convinced that is something to do with the exhaust. Im going to change the cat anyway on the weekend and clean the pod out.

Cheers

P.s I really appreciate all the tips you guys have been giving me so far, thanks guys

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

    • GTSBoy
      R32 GTR EV? The leaf of the Godzilla's!

      By GTSBoy · Posted

      Yes...but look at the numbers. There is a tiny tiny fraction of the number of Joules available, compared to what is used/needed. Just because things are "possible" doesn't make them meaningful.
    • Butters
      UniClutch

      By Butters · Posted

      Thanks for taking the time to post that ! If anything changes or happens please do update us. 
    • joshuaho96
      R32 GTR EV? The leaf of the Godzilla's!

      By joshuaho96 · Posted

      Somehow Vertimass/Oak Ridge National Labs has figured out a catalyst that can convert ethanol into C9-C10 hydrocarbons in basically a single step without ending up with a bunch of ethylene or similar waste products: https://patents.google.com/patent/WO2023224867A1/en I still don't think anything like this will keep us from needing to transition to EVs regardless along with all kinds of other electrification, but things like this will go a long way towards alleviating the problem of how to electrify things like planes. Renewable diesel is seemingly an easier problem as well, Chevron is already running refineries for the stuff and the primary feedstock is tallow and other waste fats from agriculture.
    • RB2533
      UniClutch

      By RB2533 · Posted

      Ok so I have sorted everything with my uniclutch and  i can offer up a bit of feedback and some things that might help others.    I found problems with factory damper line. Weird shit and had trouble with peddle adjustment    I used this https://au.gktech.com/products/r33-gts-t-skyline-braided-clutch-line?_pos=2&_sid=22b01b9b9&_ss=r Also when adjusting peddle leave a bit of play. You can get into a over stroke condition easy.. Make sure you can push the slave forward after adjusting to confirm fluid can return to master then you will need to pump it up heaps…..not sure why but that’s how it is.    last thing the splined adapter is machined perfectly. If your input shaft is old like mine was I would put a bit of valve grinding paste on it and stroke it like a 15 year old. Just to give it a tad more clearance and to better match it to the spline.    reason is on a near flat shift I have had situation where the peddle returns a millisecond after you lift from the clutch. No slip or anything but I reckon this is due to tolerance on the spline being way tighter than stock clutch and binding for a sec. I think this will go away but also my spline was old. Box is old so I guess I should have checked better. It’s a super neat fit.    it feels light as and holds awesome without any noise    
    • Duncan
      Rv37 400r questions

      By Duncan · Posted

      My Fuga Hybrid is JDM, 2014 model but very similar to the V37 from the looks of things..same platform just physically larger and very comfortab;e
×
×
  • Create New...