Jump to content
SAU Community

Rb25 - Z32 Nistune Ecu - Vtc Not Working :(

kubus

By kubus,
in Engines & Forced Induction

 Share

Recommended Posts

Rolls Grand Master

Rolls

Posted
Posted

Does it need to make that clicking noise when revving on idle to ensure it is working?

If the solenoid isn't clicking, then it obviously isn't moving and hence it isn't working.

Isn't that fairly obvious lol?

  • 1 month later...
Torques Mentor

Torques

Posted
Posted

Hello there,

I have an RB25 with Z32ECU+Nistune.

The Z32ECU activates VCT by (engine)load, not RPM, however you can change this by

changing parameters in Nistune.

Look at what I (User: Torque)wrote here:

http://forum.nistune.com/viewtopic.php?f=8&t=2125

This is tried tested and proven...

However despite Z32 giving the VCT-Signal, I think VCT is not working on my car.

Judging from my Dyno, I lost about 100NM ar 3000rpm.

Also the car is like a slug at low RPM.

I will (tonite) test if my solenoid is working by applying GND to the selenoid itself.

How did you get on with the issue at your side?

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Torque's try disconnecting it and go for a drive, then power it up and go for a drive, see if there is a difference.

I read ur thread on nistune a while back. I am just about to tune my rb25 in r32 with z32 ecu but my car doesnt have a speedo so im not sure if i can get vtc to work

SargeRX8 Grand Master

SargeRX8

Posted
Posted (edited)

When I put my clutch it and just TOUCH my throttle and hold it, I can hear a click, in a gear, stationary. When I lift my foot off the throttle, it clicks again. RPM doesn't matter, even at 800rpm I can hear a click, when its in gear and clutched in the click when release the throttle. Is this the VCT thing? Just wondering because I have NFI what it is. Doesn't do it in neutral. Power FC.

Edited by SargeRX8
GTSBoy Grand Master

GTSBoy

Posted
Posted (edited)

I am just about to tune my rb25 in r32 with z32 ecu but my car doesnt have a speedo so im not sure if i can get vtc to work

Have you considered just getting an R32 speedo head and connecting it to a speedo drive cable (and gearbox obviously) and electrically to the ECU and then hiding it somewhere, so it does what it is supposed to do for the ECU?

You'd need to do the Navara speedo drive mod for the RB25 gearbox of course, but that's no biggie.

Edited by GTSBoy
RB25 SKYLINE Experienced

RB25 SKYLINE

Posted
Posted

Torque's try disconnecting it and go for a drive, then power it up and go for a drive, see if there is a difference.

I read ur thread on nistune a while back. I am just about to tune my rb25 in r32 with z32 ecu but my car doesnt have a speedo so im not sure if i can get vtc to work

this is how i tested mine and its very simple if u drive it and it is faulty u will notice a huge power difference between it being plug in and unplugged mine also was leaking oil out of the plug.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Have you considered just getting an R32 speedo head and connecting it to a speedo drive cable (and gearbox obviously) and electrically to the ECU and then hiding it somewhere, so it does what it is supposed to do for the ECU?

You'd need to do the Navara speedo drive mod for the RB25 gearbox of course, but that's no biggie.

i ordered the navara speedo drive from nissan this morning, $65 retail part number is 32702 - 02G17

i havent checked to see if it requires a neutral switch yet.

Torques Mentor

Torques

Posted
Posted (edited)

You can, when you set up the minimum speed for activation to ZERO.

If you have questions let me know.

As for my VCT, I tested it yesterday by connecting a light bulb to the solenoid.

Sadly it worked ;)

Also I activated the solenoid manually (by applying a voltage to it)

(It clicked and then the valve train rattled a bit, also rpm went down)

I have to say that I have Poncams, and these might just work as if VCT was on most of the time.

(more overlap)

Anyhow, I will find out what's wrong.

Torque's try disconnecting it and go for a drive, then power it up and go for a drive, see if there is a difference.

I read ur thread on nistune a while back. I am just about to tune my rb25 in r32 with z32 ecu but my car doesnt have a speedo so im not sure if i can get vtc to work

Edited by Torques

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

    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Harness is for a s1 Rb25det, and it is engine and lower harness.  the old harness had broken off plugs and was in very rough condition/exposed wires and splices etc. it is not able to be put back on the car, I could visually inspect to see if they had rewired any pins on the ecu plug. The fuel pump definitly isn’t turning off it’s an external pump and very loud you can hear it. Will look at the other harness tonight, am also going to pull the fuel rail and watch the injectors spray, will update here with what I find. Pretty sure at this point it has to be something to do with injectors because car will fire up on starting fluid and cas is clicking the Injectors. Fuel pressure is steady 43psi 
    • Waders360
      M35 Brake caliper replacement

      By Waders360 · Posted

      Sorry. Front brake calipers
    • MBS206
      S1 rb25/s14 starting problem

      By MBS206 · Posted

      Check the injectors flow evenly, and are actually flowing what you and the ECU think they should be flowing. If it's starting up on starter fluid, you have a fuel issue. Is it possible under cranking your fuel pump is turning off?   The harness you replaced, is that the whole engine harness? Do yourself a test, and drop the old harness on and plug it into the Z32 ECU. It's possible they've wired things different. From memory S1 to S2 is different in RB25 and you may have a wrong loom
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I haven’t pulled the injectors to watch them spray yet but they are clicking from the cas and all of the spark plugs are wet with fuel. I’ve thought the cylinders were being flooded from the beginning and was hoping fuel pressure would fix it. Tonight I am going to pull the rail and watch the injectors spray. Don’t know how to test/diagnose if the plugs are firing in correct sequence but that should be a timing thing and as far as timing goes my car still has the half moon for the cas can only install it 1 way. And my mechanical timing is 100% correct I posted photos above. Confirmed with the balancer on and off. 
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I checked spark on all cylinders and they all visually have spark with the plug pulled and grounded, but plug 1 is the only one that fouled. This was a running swap that blew up and was rebuilt by a machine shop, put a new wiring specialties harness and did all gaskets, studs, and bolts while it was out.  compression is 135-150 across all cylinders. Aside from that from my understanding with the z32 ecu and maf the car should start regardless. The wiring for TPS and the dual 02 sensor/ dual knock sensor stuff shouldn’t actually stop the car from starting or even running well, (just slightly rich)  they just give fault codes. Car supposedly is supposed to start as long as you have z32 afm and ecu with the nistune base map and that’s info coming from a well known and trusted tuner who does a lot with SR/RB (Rsenthalpy). After more trouble shooting today where I’m at right now is that the cas is sending signal to the injectors they click while spinning the rotor, Fuel pressure is now set at 43psi, all cylinders have good compression and all of the plugs looked great (just wet with fuel) except for cylinder 1 which was very black (cylinder 1 has 150psi compression). all of the coils generate spark if pulled out and grounded out on the head. On the fuel pump car just pops into the exhaust. On starting fluid car will fire off. Hard to tell if all cylinders are firing off but definitley a couple. sounds like all of them but it’s only for 3-5 seconds hard to tell. 
×
×
  • Create New...