Jump to content
SAU Community

Ignition Issue?

Aaron BNR32 GTS-T

By Aaron BNR32 GTS-T,
in Engines & Forced Induction

 Share

Recommended Posts

Aaron BNR32 GTS-T Collaborator

Aaron BNR32 GTS-T

Posted
Posted

ok so i hooked up an 'ECU TALK' to my r32 gtst and i have found that when the car is cold the ignition timing is out...

it goes from the normal 15*btdc at idle to 7* btdc up tp around 2800rpm then starts working as normal from there to red line.

once the car gets warm it stops and i dont experiance it until the car is stone cold again. i just replaced the coilpacks with splitfires

and it still happens so thats no the issue

my question is what could be causeing this? crank angle sensor? i recently did the timing belt and everything was sweet and looked in order

cheers for the help

Link to comment
https://www.sau.com.au/forums/topic/378310-ignition-issue/
Share on other sites
rob82 Mentor

rob82

Posted
Posted

ok so i hooked up an 'ECU TALK' to my r32 gtst and i have found that when the car is cold the ignition timing is out...

it goes from the normal 15*btdc at idle to 7* btdc up tp around 2800rpm then starts working as normal from there to red line.

once the car gets warm it stops and i dont experiance it until the car is stone cold again. i just replaced the coilpacks with splitfires

and it still happens so thats no the issue

my question is what could be causeing this? crank angle sensor? i recently did the timing belt and everything was sweet and looked in order

cheers for the help

Its commanding that value - therefore its in the tune.

I believe its a catalyst warm up function. I've havn't disassembled these ECU's enough to find where it requests the retard from but I'm guessing its a single signed 8-bit value added to the main table.

Link to comment
https://www.sau.com.au/forums/topic/378310-ignition-issue/#findComment-6032800
Share on other sites
GTSBoy Grand Master

GTSBoy

Posted
Posted

I concur. I had always thought that the standard tune locked in 15° until it was warm. On my car, pretty much the instant the temp gauge made it to the centre of scale you can feel the timing unlock and it gives a tiny little jump. Doughy before that and normal afterwards. As carns says, you can adjust this with Nistune.

Link to comment
https://www.sau.com.au/forums/topic/378310-ignition-issue/#findComment-6033525
Share on other sites
Aaron BNR32 GTS-T Collaborator

Aaron BNR32 GTS-T

Posted
  • Author
Posted

standard they pull shitloads of timing so just needs a retune with nistune or something. Can make the car drive pretty shit when cold once you start modifying stuff.

yeah i have found that ot goes like a sack of shit when its coldish, i do need to take it to get tuned cause it didnt get a full tune in the first place because of coil pack failure :(

just got to put my front mount on and she will be ready for the tuners :)

but this shouldnt damage my engine if i drive it like this until then?

Link to comment
https://www.sau.com.au/forums/topic/378310-ignition-issue/#findComment-6034186
Share on other sites
GTSBoy Grand Master

GTSBoy

Posted
Posted (edited)

It's actually better for it to run low timing numbers while it warms up. a) it helps warm it up faster, b) it stops you from driving it hard until it has at least a little heat in it. The only reason to adjust it is if it is being a complete pig because of being modified away from where the Nissan methods works. If it's just being a little doughy then best leave it as it is. My car is basically stock (injectors and turbo are stock), so it still behaves more or less as Nissan intended. My temp gauge comes up to mid scale after just a few minutes of driving if I drive straight off from a cold start. That's where the cold start retard ends. That's OK with me. So I didn't bother changing it when I tuned the ECU.

Edited by GTSBoy
Link to comment
https://www.sau.com.au/forums/topic/378310-ignition-issue/#findComment-6034218
Share on other sites
Aaron BNR32 GTS-T Collaborator

Aaron BNR32 GTS-T

Posted
  • Author
Posted

yeah mines a pig lol a truck taking off from the lights is the same acceleration speed lol

i have exhaust, ARC intake, ARC side mount, turbo back exhaust, blah blah blah lol so maby

i should get it all sorted when i get it re tuned :)

Link to comment
https://www.sau.com.au/forums/topic/378310-ignition-issue/#findComment-6034229
Share on other sites

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
      New kid on the block

      By GTSBoy · Posted

      The wiring diagram for the R33 RB25 is freely available, and is essentially the same same as most other RBs (just with differences as to which pin # does which job). To get the ECU to power up, you just need to provide power to the ECCS relay, and have the other power feeds that come in from the top left of the wiring diagram (wrt the ECU) that give perma power to the fuel pump relay, the ECU itself, etc etc, all connected. When you put power on all these it will just come to life. It's pretty clear from the diagram what needs to happen. Just follow the lines from the 12V + supply stuff in the top left over towards the ECU. I've even posted snips of such diagrams (not for vanilla 25, I think for Neo and 26) to various threads here in the last few months, talking about what it takes to get the fuel pump and FPCM up and going. Search these up and they will help get you started on doing the same with the vanilla 25 diagram. Hell, for all I know, I've done the same with that one in years past and have forgotten.
    • Duncan
      New kid on the block

      By Duncan · Posted

      Yep...so unless someone posts up the answer you will need to probe from the ECU connector to the dash plug with a multi meter in continuity mode to trace the wires.  Note the ECU has multiple - and + (and across different key settings - Battery, IGN and Start) and most likely the power is fed from the connector(s) that is normally near the left hand headlight.
    • Songo
      New kid on the block

      By Songo · Posted

      Thanks Duncan, I am actually just trying to get the Rb turning and running with the RB25DET S2 original loom itself  I am just trying to get it going outside the body and not thinking about the S15 or trying to match anything to the S15 loom at all I am only trying to see if anyone has done this and what pin they found to be the ignition trigger and ECU+/- on the dash connector, that's about it. Thanks  
    • iain_ST44GA
      M35 VQ25DET starter motor

      By iain_ST44GA · Posted

      Hi Guys, Does anyone know any aftermarket part numbers for a starter motor to suit the VQ25DET? I can find lots of alternative part number for the VQ35DE, which I assume would fit, but there is a lot of conflicting information out there. Thanks..
    • Murray_Calavera
      R33 GTR running -9 with no tune

      By Murray_Calavera · Posted

      I don't understand how this hasn't boiled down to - Upgrade the turbo when you have everything required. ECU, injectors, fuel pump, turbo, etc. Do it all at once.  If you don't have everything required, just enjoy the car as it is and keep saving up your pennies. 
×
×
  • Create New...