Jump to content
SAU Community

Car Is Stuttering On Low Revs? Wtf

FSTR32

By FSTR32,
in Engines & Forced Induction

 Share

Recommended Posts

FSTR32 Rising Star

FSTR32

Posted
Posted

got my car back today (r32 gtst with rb25det neo) and as you accelarate in low revs it stutters a bit...almost like its gasping for fuel and then as you give it a bit more on the gas it corrects itself after about 3500revs and revs smooth all the way to the top of the rev range. No its not a miss fire as ive had a miss b4 and this is different. car is pretty highly modded. just got splitfires, and have had gtr pump, 630cc injectors and microtech for ages. Car just had a full tune + remap and it was done by one of the best tuners in aus. not sure whats going on? can anyone shed some light before I call him in the morning?

thanks

Luke

Link to comment
https://www.sau.com.au/forums/topic/188002-car-is-stuttering-on-low-revs-wtf/
Share on other sites
_Ryan_ Grand Master

_Ryan_

Posted
Posted

grab some CO contact cleaner from repco, clean the airflow meter wire. only do it if the car hasnt been run in atleast 12hrs

check for boost leaks.

fixed a mates 32 that way.

obviously no responsibility is taken if you damage the AFM or car in anyway.

-Ryan

BHDave Grand Master

BHDave

Posted
Posted

Whats been done to it between tuning and getting it back?

because a light load misfire is pretty bloody obvious and your tuner should have mentioned something.

He must have done some light load tuning, and because the ecu is map based a vacuum leak doesn't really affect it if it was tuned with it.

so, it's either a vacuum leak thats happened after the tune, a sticky injector maybe, or the tune is up to shit.

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

    • Dose Pipe Sutututu
      M35 Aftermarket Fuel Pump

      By Dose Pipe Sutututu · Posted

      Yeah, I don't believe the M35 uses a deadhead system.
    • GTSBoy
      M35 Aftermarket Fuel Pump

      By GTSBoy · Posted

      Have you done your thinking backwards? 3 bar, 43.5 psi pressure drop being the presumed specification for an injector, means you need 3 bar upstream when they are firing into atmospheric pressure, and more upstream pressure than that when on boost (you add your boost to your rail pressure to maintain 3 bar across the injector) and you need..... less pressure upstream when you have vacuum in the manifold. So, presuming that you're idling at -10 psi, then you only need ~23 psi in the rail. I realise that I did not need to say all of that to you specifically Matt, once you'd realised your mistake. It's mostly there for complete clarity for others.
    • Dose Pipe Sutututu
      RB25 Drama's

      By Dose Pipe Sutututu · Posted

      Have you reached out to the guys at Spool Imports? They are a Ross dealer, I can imagine they would have the rings just sitting on the shelf (I could be wrong).  
    • GTSBoy
      Back for more after 18 years - and where are the longnose R200 LSDs?

      By GTSBoy · Posted

      There's one for sale at Grand Auto Wreckers in Lonsdale (SA), for .... let's suggest the sum they're asking for will make you cry. You may have to embrace the idea of modifying the rear subframe to accept some other diff. You could probably find a way to wangle a shortnose into there, with a custom rear adapter and some sort of shenanigans to relocate the front mounts. This has probably already been done by others, so there might be some guidance available as to how easy/impossible it is, out there in the googles. But you possibly needn't restrict yourself to Nissan diffs if you're going to contemplate that. There are similarish Toyota diffs, possibly some Euro ones, possibly some Seppo ones.
    • Duncan
      G35 Control arm and Compression Rods into a V35 Skyline.

      By Duncan · Posted

      The ball joint taper and arm taper have to match angle and diameter, but just doing the bushes is a much better option.....seems like the industry moved to "it is cheaper to replace the whole arm than take on the labour for changing this bushes", glad the aftermarket supports it
×
×
  • Create New...