Jump to content
SAU Community

R34 Gtt Hesitation While Cruising

so_tred

By so_tred,
in Engines & Forced Induction

 Share

Recommended Posts

so_tred Proficient

so_tred

Posted
Posted (edited)

Over the last few weeks gradually getting worse my R34 GTT has had an issue where I'll be slowly accelerating/cruising along and the car will hesitate for a second. It feels like when the TCS system kicks in and cuts the power but for a shorter time.

At first I was thinking it could be the CAS or something like that but last night whilst driving (with TCS turned OFF) it did it a few times and then the SLIP light came on and stayed on until I turned the car off & on again. I'm wondering if the TCS is for some reason malfunctioning.

(The car had splitfires installed approx 50,000km's ago as well as new platinum plugs)

Any ideas or similar situations?

Edited by so_tred
Link to comment
https://www.sau.com.au/forums/topic/347290-r34-gtt-hesitation-while-cruising/
Share on other sites
rondofj Veteran

rondofj

Posted
Posted

Sorry for hijacking - this could help u if its not TCS related -

I had that infamous flat spot between 4700-5400 rpms, the car would also hesitate for a sec in fifth gear around 3rps when booting it, although my TCS doesnt work at all - no light on dash at all.

Changed to 0.8mm gapped NGK copper plugs, left my standard coils in. No change to above problem.

Then yesterday after reading a few bits on SAU, I reset my ECU - take off the battery terminals, stab the brake pedal a few times (brake light on/off) to drain off all the charge, then re-connect and go for a drive.

I'm just amazed to say after the ECU reset - the flatspot is almost completely GONE, not only that, the car feels so fresh, crisp and very quick to rev and GO!!

so_tred Proficient

so_tred

Posted
  • Author
Posted

Took it to a workshop yesterday who pulled the error code for the AFM.

It was cleaned etc, drove it this morning and I didn't really feel the hesitation but the SLIP light once again came on.

Is it a symptom of a dying AFM? It just seems like two very different systems?

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

    • ARB26
      RB26DETT Sketchy boost mod?

      By ARB26 · Posted

      Thanks Duncan, that's the best info I've read. Furthermore after learning about the PCM programming side controlling the factory boost solenoid, the purpose of the solenoid is to "bleed" boost when pin 25 is earthed, thus allowing spring pressure in the wastegate actuator to overcome diaphragm boost pressure, thus closing or reducing the position of the wastegate flap creating more boost as the turbo is able to spin faster. It's pretty cool to see a designated Pill to do exactly this, would have liked to have seen it with a tiny filter over the end for those moments in vacuum.  The constant bleed pill has now been removed completely from the system and solenoid boost control has been restored once again.   Case closed 😂
    • GTSBoy
      Cas issue

      By GTSBoy · Posted

      The wideband reading is meaningless if it's not running. Why are you using shitty old sidefeeds on any engine, let alone a Neo? What manifold and fuel rail are you using to achieve that? Beyond that, can't help you with AEM stuff as I've never been their ECU/CAS combo.
    • Duncan
      RB26DETT Sketchy boost mod?

      By Duncan · Posted

      Manual boost controllers (where a little of the boost was bled off) were quite common back in the day, because they were cheap and easy. Generally they had a manual adjustment screw rather than being fixed like yours. Down side is they always bleed boost, not just when you want them to so an electronic boost controller that uses a solenoid will have less lag.
    • nash47
      Cas issue

      By nash47 · Posted

      Hello , im new here and i have A31 home build  RB25det neo stock eng / turbo  aem ems 2 blue connector  aem 3.5 map aem cas disk aem wideband connected to ecu  355 lph pump 550 nismo yellow injectors side feed aftermarket regulator  and won’t start with base aem tuner basic tune eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle  Now it won’t start Wideband reads 10 and 11 at lowest fuel setting  and will share calibrations soon for aem tuner i think something is wrong in aem tuner    please if you have any information, am very grateful         
    • nxh
      R34 4 door side skirt identification

      By nxh · Posted

      Legend. I ended up finding the facebook account of the owner of the first car i sent but sadly he deactivated the account. I think you’re right in saying it’s some sort of well done custom job. Really appreciate your help anyways.
×
×
  • Create New...