Jump to content
SAU Community

R33 Gtst S2 Running Rough - Help Needed!

01kings10
 Share

Recommended Posts

01kings10 Explorer

01kings10

Posted
Posted

Lately my R33 GTST S2 has been running really rough, the car 'vibrates' while idling and under throttle the shake gets worse, as if the car is missing.

Also if I give the car a small rev at idle, the idle screws up and fluctuates better 100-800rpm. I can correct this by free revving the car to about 3k RPM???

Since I bought the car 3 months ago it seems as it has lost a fair bit of power throughout the rev range due to these problems.

The story behind it:

I installed a powerFC in the car which had a tune for another car, I ran this for about a week then took it out because the car was running too rough (the car was running very smooth with the stock ECU). This is where the problems started!

After putting the stock ECU back in I found that these problems continued, and the car is still running rough.

So far to try and fix the problem (thinking it was a simple misfire problem) I've replaced the spark plugs with platinum and reset the ECU, but no luck :(

Some info on the car:

  • RB25DET 140,000km
  • New platinum plugs
  • New Walbro 255lph fuel pump
  • FMIC
  • 9psi boost
  • Pod filter
  • 3" turbo back exhaust

Would really appreciate any sort of help!

Thanks :)

markdem Community Regular

markdem

Posted
Posted (edited)

get yourself a nice little - slow but sure - process of elimination going. i'd be looking at:

connections (this includes pipes: air leaks)

timing

fuel systems

start simple, then get more technical

Edited by markdem

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
      Rebuilt Rb25det issues

      By GTSBoy · Posted

      Use a 2' length of hose (that's 2 foot, not 2 inches) as a stethoscope to localise the source of the ticking. From cam covers? From exhaust or turbo manifold gasket? From injectors? From lower down in the engine? Etc. Use a timing light to set the timing. Put Redline Lightweight Shockproof in the box. It's not the very best thing for the box, but it will take a box that refuses to engage a gear with other oil, and make it engage a gear. I had to put it in when I installed the R33 box I have in my car. It would not select ANY gear when running. Smurf jizz made it work. That was >10 years ago and I still use it. I'm stuck with it now. Failing that - rebuild the box.
    • Victory
      Neil's R33 Gts-t Build

      By Victory · Posted

      Well done Duncan. The fuel tank bulkhead lid is also in great condition (some of mine were stuffed). These are now out of production and good ones like that are becoming hard to come by.
    • Milkmun
      S15 Spec R

      By Milkmun · Posted

      Wow that's a steal, you've done well there. 
    • trey318
      r34 gtt led globes

      By trey318 · Posted

      Exterior LEDs R34 2Dr R34 4Dr Position Lamp T10 T10 Winker front T20S T20S side T10 T10 rear T20S S25S150 Anti-hyfla relay TYPE3 TYPE3 tail T10 T20W Stop Lamps T20W T20W High Mount T16 T16 back T16 T20S number T10 T10 trunk T10 T10 Interior LED Item No.     Map Lamp BA9S single-sided     Room Lamps T10×31     Trunk Lamp T10     meter Early T6.5 pedestal     final T6.5 pedestal     NISMO T6.5 pedestal     Liquid crystal section T6.5 pedestal     Winker T6.5 pedestal     High Beam T6.5 pedestal     3 SERIES METER Early T6.5 pedestal     final T6.5 pedestal     NISMO T6.5 pedestal     air conditioner Early Liquid Crystal T3     Late LCD T4.2 Short     button T4.2 Middle     Hazard SW T3 Pedestal Short     Keyring T5     Cigar Socket T5
    • KyoyaR33
      Rebuilt Rb25det issues

      By KyoyaR33 · Posted

      Howdy all,   I had my rb25det S2 rebuilt and finally started it today but have run into a few issues  Engine sounds like a a diesel easiest way to summarise like small ticking, gets louder when revs are slightly adjusted  The engine builder repainted the engine cover leaving no where for me to go off with lining up the CAS so have it as central as possible so not sure it that could be affecting it?, changed the gearbox fluid too but won’t seem to go into gear when running, and only 1 to 4 when off having a hard time finding 5th and reverse anyone got any ideas or a base for me to start off? much appreciated 
×
×
  • Create New...