Jump to content
SAU Community

GTR Power FC "experts" wanted!!

GTS4nMore

By GTS4nMore,
in Engines & Forced Induction

 Share

Recommended Posts

GTS4nMore Enthusiast

GTS4nMore

Posted
Posted

Hi,

I have a GTR power FC which will not save it's values. You can change the value eg idle RPM & the Idle revs don't seem to change. Also after you turn off the ignition (& back on) the value you set it to is back to the previous setting.

My car is an R33 GTS4 with RB26DETT, it's running fine from a standard R33 GTR ECU.

Things I have tried:

Checked all power & earth connection to the ECU as per nissan wiring diagram - OK

Tried another PFC with my hand controller in my car - has the same problem

Yet to try:

My PFC in another car

Another Hand Controler with My PFC

My deduction so far is that it is either the car's wiring or the Hand Control...

Can any body help, or know of a good workshop who could help to sort this out.

Thanks in advance.

Link to comment
https://www.sau.com.au/forums/topic/58003-gtr-power-fc-experts-wanted/
Share on other sites
Targa Tom Proficient

Targa Tom

Posted
Posted
Hi,

I have a GTR power FC which will not save it's values. You can change the value eg idle RPM & the Idle revs don't seem to change. Also after you turn off the ignition (& back on) the value you set it to is back to the previous setting.

My car is an R33 GTS4 with RB26DETT, it's running fine from a standard R33 GTR ECU.

Things I have tried:

Checked all power & earth connection to the ECU - OK

Tried another PFC with my hand controller in my car - has the same problem

Yet to try:

My PFC in another car

Another Hand Controler with My PFC

My deduction so far is that it is either the car's wiring or the Hand Control...

Can any body help, or know of a good workshop who could help to sort this out.

Thanks in advance.

Probabley locked by Excel tuner... find a Datalogit owner and they can unlock it for you... It won't cost over $1000.

Oh, you say two different PFC's do the same thing? Well thats a different story.

Will it accept a change to the ignition or fuel map?

TT

GTS4nMore Enthusiast

GTS4nMore

Posted
  • Author
Posted

Thanks Tom, I think it was you who suggest before it may be locked.

I took it to croydon & had Jim check it out, he said when it's locked that you cannot even access the fuel map menu etc.

Mine is all there, it just won't save. :(

Sydneykid Grand Master

Sydneykid

Posted
Posted
Hi,

I have a GTR power FC which will not save it's values. You can change the value eg idle RPM & the Idle revs don't seem to change. Also after you turn off the ignition (& back on) the value you set it to is back to the previous setting.

My car is an R33 GTS4 with RB26DETT, it's running fine from a standard R33 GTR ECU.

Things I have tried:

Checked all power & earth connection to the ECU - OK

Tried another PFC with my hand controller in my car - has the same problem

Yet to try:

My PFC in another car

Another Hand Controler with My PFC

My deduction so far is that it is either the car's wiring or the Hand Control...

Can any body help, or know of a good workshop who could help to sort this out.

Thanks in advance.

You have to save the changes, have a look at the Commander Manual it shows you the steps.:)

GTS4nMore Enthusiast

GTS4nMore

Posted
  • Author
Posted

I'm pretty sure I'm saving the settings as per the manual, Jim from Croydon Autosports also confirmed that the values are not being saved. He blamed the wiring.

Tomorrow I will try swapping HC & PFC into a known working GTR & see what I can work out.

S/N of PFC PFC-RB26-9605-0349

S/N of HC FCC-NT9605-0366

I'm guessing that the "9605" means that they should be matched.

RPMGTR Community Regular

RPMGTR

Posted
Posted

You'll find it is the wiring in the vehicle to the ECU that is the problem....

A couple of the pinouts require permanent power and then there is a shutdown sequence where the ign switch power is shut off to certain pinout and then the ECU then saves settings and turns itself off. Any change in this power down sequence,(different wiring, alarms, immobilisers)wil cause the symptoms you describe.

Similiar to pulling the plug on a windows based PC rather than shutting it down correctly....

cheers.

GTS4nMore Enthusiast

GTS4nMore

Posted
  • Author
Posted

RPMGTR, looks like you are correct.

I tried my PFC&Commander in a real GTR today, Thanks to NVDAGTR :P , & it worked fine :(

I noted all of the pins on the ECU which had power, now I can test this in my car & hopefully find the variance....

It's strange how the factory ECU works without whatever is different!

Emre Proficient

Emre

Posted
Posted
RPMGTR, looks like you are correct.

LOL... How many times have I heard that before...?

The difference with the stock ECU is that, it doesn't have to save any changes, as it's not programmable.

AFAIK, there is no save function with the commander, it applies the changes as soon as you change any parameter. The changes are saved when the ignition is turned off, which explains your problem.

Is the GTS4 wiring same as the GTR wiring...?

GTS4nMore Enthusiast

GTS4nMore

Posted
  • Author
Posted
Is the GTS4 wiring same as the GTR wiring...?

Would I be having this problem if it was???

I was just hoping that if people had heard of this problem or experienced it so many times they could say something like "yes, pin XX needs contant power for the data to be saved".

Hopefully I can sort it on the weekend & post the results here for future reference.

Emre Proficient

Emre

Posted
Posted

According to this site (click), most of the Nissan ECUs share the same pinouts.

Your problem is that RB26 transplants in an R33 GTS4 is not very common, give SDU a try as well. Different models of skylines are more prominent there.

Good luck on the weekend.

GTS4nMore Enthusiast

GTS4nMore

Posted
  • Author
Posted

The Weekend has been a success :wassup:

Pin 16 & the ECCS relay power supply turned out to be the culprits

You don't know how long I have been trying to solve this.... very frustrating :)

Attached are my finding for all those who have this problem in the future.

Thanks again to NVDAGTR for letting my try my PFC in his car :)

Targa Tom Proficient

Targa Tom

Posted
Posted

just had a response from the Datalogit forum from an SR20 punter who had experienced the same problem!!!

Do you have a wiing diagram - or the rest of the one above. I have'nt seen one so clear before.

TT

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

    • brillo
      Leak from Tokico BM50 Brake Master Cylinder

      By brillo · Posted

      Hi, SteveL Thank you very much for your reply, you seem to be the only person on the net who has come up with a definitive answer for which I am grateful. The "Leak" was more by way of wet bubbles when the pedal was depressed hard by a buddy while trying to gey a decent pedal when bleeding the system having fitted the rebuilt BM50 back in the car, which now makes perfect sense. A bit of a shame having just rebuilt my BM50, I did not touch the proportioning valve side of things, the BM50 was leaking from the primary piston seal and fluid was running down the the Brake booster hence the need to rebuild, I had never noticed any fluid leaking from that hole previously it only started when I refitted it to the car. The brake lines in the photo are "Kunifer" which is a Copper/Nickel alloy brake pipe, but are only the ones I use to bench bleed Master cylinders, they are perfectly legal to use on vehicles here in the UK, however the lines on the car are PVF coated steel. Thanks again for clearing this up for me, a purchase of a new BMC appears to be on the cards, I have been looking at various options in case my BM50 was not repairable and have looked at the HFM BM57 which I understand is manufactured in Australia.  
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      PXL_20250828_063541093.TS.mp4
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      Well the install is officially done. Filled with fluid and bled it today, but didn't get a chance to take it on a test drive. I'll throw some final pics of the lines and whatnot but you can definitely install a DMAX rack in an R33 with pretty minor mods. I think the only other thing I had to do that isn't documented here is grind a bit of the larger banjo fitting to get it to clear since the banjos are grouped much tighter on the DMAX rack. Also the dust boots from a R33 do not fit either fyi, so if you end up doing this install for whatever reason you'll need to grab those too. One caveat with buying the S15 dust boots however is that the clamps are too small to fit on the R33 inner tie rod since they're much thicker so keep the old clamps around. The boots also twist a bit when adjusting toe but it's not a big deal. No issues or leaks so far, steering feels good and it looks like there's a bit more lock now than I had before. Getting an alignment on Saturday so I'll see how it feels then but seems like it'll be good to go       
    • PranK
      R35 GT-R production ends after 18 years

      By PranK · Posted

    • SteveL
      Leak from Tokico BM50 Brake Master Cylinder

      By SteveL · Posted

      I don't get in here much anymore but I can help you with this.   The hole is a vent (air relief) for the brake proportioning valve, which is built into the master cylinder.    The bad news is that if brake fluid is leaking from that hole then it's getting past the proportioning valve seals.   The really bad news is that no spare parts are available for the proportioning valve either from Nissan or after market.     It's a bit of a PITA getting the proportioning valve out of the master cylinder body anyway but, fortunately, leaks from that area are rare in my experience. BTW, if those are copper (as such) brake lines you should get rid of them.    Bundy (steel) tube is a far better choice (and legal  in Australia - if that's where you are).
×
×
  • Create New...