Jump to content
SAU Community

Neo Motor Cuts Injectors At 2500rmp In Neutral

fubar

By fubar,
in Engines & Forced Induction

 Share

Recommended Posts

fubar Enthusiast

fubar

Posted
Posted

Heya peeps

Just replaced my blown neo motor in my r32 in installed a second hand long motor in. Now if you stab the throttle it will rev high then cut but if you slowly rev it to 2500rpm it cuts the injectors. i tested the hz to the injector and it dropps of completly at 2500rpm.

There is a few mods to the car so one of these could be the problem but was just wondering if any1 has come across this before and has a quick fix, that would be sic:)

Cheers

Dan

fubar Enthusiast

fubar

Posted
  • Author
Posted
doesn't limp mode kick in around 2500rpm? that's often caused by a dodgy air flow meter.

Yeah that sounds about right but i can stab the gas and it will rev high. How do you test the air flow meter, change it? Its a z32.

The motor had standard intake manifold and injectors, i have now put a front intake plemun, 650cc injectors, fuel rale and regulator and 80mm throttle, so she is over fueling big time atm.

Im just trying to get it driveable to get it to the tuner then the nis tune will go in.

fubar Enthusiast

fubar

Posted
  • Author
Posted

yeah stock ecu (its an rb20det ecu and loom) but it has some kinda chip on it from japan! and it is running a dodgie safc 1 the old school one with the dials lol

I think it is just running so rich it is going into limp mode. I've dropped the fuel pressure to 2 bar and leaned out the safc but still no luck. I wanted to give it a good run just to make sure everythin is ok like water lines etc before it goes to the tuner

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
      Nismo GT Pro LSD configurations

      By GTSBoy · Posted

      Well, the trouble with that ^^ is: The configuration shown is absolutely a 1-way, not a 1.5-way. There is no way that a 1.5-way can be said to offer LSD action only on acceleration. If Nismo cannot get that right, then it is impossible to believe their documentation. That ^ is not a 1.5 way setup. That is a 1-way.   And so now I have allowed all doubts to flourish and have gone back to look at the MotoIQ video. I originally made the mistake of believing him when he said "this is a 1.5-way" at the ~6:10 mark. Because what he did was take the gear assembly out of the 2-way opening and just rotate it one place to the left to drop it into the 1-way opening. When he dropped it in there, the cam was "backwards" compared to the correct orientation shown in all other photos of that config. The flat shold have been facing the 1° ramp side of the opening, not the 55° ramp side. And I thought, "gee that's cute", but I was concerned at the time, when he put the other ring back on, that the gap between the rings looked like it was wider then in the 2-way config. And then I said a lot of things in my long post on Tuesday that could only make sense if the guy from MotoIQ was correct about what he'd done. BUT... I have now done my homework. I grabbed a frame of the video with the 2-way config, and then grabbed another with the "1.5-way" config, snipped out the cam and opening of that frame and just pasted it direct on top of the 2-way config. I scaled it so that the triangular opening was almost exactly the same height in both. AND.... the gap between the plates is wider with the cam installed in the triangualr opening backwards. That is.... it cannot go together that way. There would be massive force on the plates all the time, if you could even reassemble it.  So, My statement on the matter? The Nismo diff is actually only a 2-way and 1-way. There is no 1.5-way option in it, regardless of what they say. Here's a photo of a real 1.5-way ramp opening from Cusco (along with the 1 way option). And the full set of 1 through 2 way options from their racing diff, which is not same-same as what we'd typically be using, but...the cams work the same. A little blurry, but it comes from this Cusco doc, which is quite helpful. AND.... Cusco do in fact do what I suggested would be sensible, which is to have rings that do 1 and 1.5, and 1.5 and 2. Separately.  
    • PranK
      Hello sau 👋

      By PranK · Posted

      Welcome Adam. Car looks great!
    • Kinkstaah
      Nismo GT Pro LSD configurations

      By Kinkstaah · Posted

      "With a 1.5-WAY, the LSD is effective only during acceleration."
    • TurboTapin
      Nismo GT Pro LSD configurations

      By TurboTapin · Posted

      Well it wasn't as easy as I thought.... and it also wasn't in my original manual which I did end up finding. They discuss the process in the Nismo catalogue though and it requires slight machining. Page 145.  NISMO PARTS CATALOGUE 2020
    • TurboTapin
      Why am I hitting a power wall with my stroked RB25?

      By TurboTapin · Posted

      I'm an idiot, my intercooler is rated for 1000hp. I had clicked on the wrong product. Knowing the delta P would be nice, but I'm doubtful I'll do it. Now as for an EMAP, that would be great and I'll get around to it eventually but from my findings in my last post, I'm considering a turbo swap now. 
×
×
  • Create New...