Jump to content
SAU Community

Car Jolting When Hitting Boost

klenn

By klenn,
in Engines & Forced Induction

 Share

Recommended Posts

klenn Contributor

klenn

Posted
Posted (edited)

Hey guys took my car for a bit of a blat on sat nite through some mean windy roads on the boost, on the brakes, on the boost,on the brakes etc went for quite sometime probly half an hour not absolutly ringing my car out but not taking it that easy either. near the end my car started joltiong as soon as it came onto boost so I pulled over and my turbo was glowing red like a peice of metal when you heat it up with a gas torch. I take it this is bad and I was giving my car abit much?......

So when the car goes to boost on high boost now it jolts but no lights or anything come up on the dash so nothing seems to be cutting out, idles fine etc. It is a series 1 gtst with standard turbo fmic bigger fuel pump etc. When the car jolts the boost jumps back from 12 to 5 psi.

Just wondering what you guys think and if this is the turbo which I think it probly is?I will check all the hoses etc incase of boost leak.

Cheers guys any help on this would be much appreciated.

Edited by klenn
Link to comment
https://www.sau.com.au/forums/topic/173205-car-jolting-when-hitting-boost/
Share on other sites
klenn Contributor

klenn

Posted
  • Author
Posted
wont be the turbo. any sign of smoke? whining etc?

i would chck plugs to see what cond they are in

Cheers man the plugs were checked not long ago but I will check them again. could it be the airflow meter if the hot hot air was blowing back into the filter? no no noises but normal boost noises and no smoke that I could notice it was at nite tho.

Ultimategtr Proficient

Ultimategtr

Posted
Posted

turbos get very hot by their sheer nature.. it could be the afm but i wouldnt place my life on it..

how bad is the jolts.... does it feel like a misfire? or more like a afm/boost cut(r33's only have afm cuts)..

does it still jolt if u ease up the throttle while driving or if u only floor it all of a sudden?

klenn Contributor

klenn

Posted
  • Author
Posted
turbos get very hot by their sheer nature.. it could be the afm but i wouldnt place my life on it..

how bad is the jolts.... does it feel like a misfire? or more like a afm/boost cut(r33's only have afm cuts)..

does it still jolt if u ease up the throttle while driving or if u only floor it all of a sudden?

There quite noticable, like you jolt in your seat. it feels more like a afm/ boost cut.....

If this is the case im saying its the computer cos thats ratted out once before and the autosparkie repaired it.

bubba Grand Master

bubba

Posted
Posted

If you think that is the case have you checked ecu plugs? also maybe check AFM plug? something could be moving around a little when you jump on the gas.. does it do it at any particular point you have noticed? (i.e. 4250rpm with 10psi and half throttle? etc etc) If you can narrow down when it is actually occuring and in with what conditions it might help these keyboard cowboys with their diagnosii :D

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...