Faq: Apexi Powerfc - Frequently Asked Questions

[RBPowered]

I have two questions I'm hoping someone can answer.

Is there a specific Power FC for a R34 GT with an RB20DE normally aspirated engine?

Will the Power FC for a R34 GT-T work?

[paulr33]

Hey Paul,

I just read there is a VCT and non-VCT PFC models for the RB25DET. Is this true? If so, how can I tell which mine is (second hand, no box). I don't know the model code right now cos it's at home.

all rb25det models support VCT

[RBPowered]

Hey Paul, I asked a couple questions two posts up. Do you happen to know the answers. Let me know. Thanks again for all your help.

[paulr33]

Is there a specific Power FC for a R34 GT with an RB20DE normally aspirated engine?

No the ER34 PowerFC assumes you have Rb25DET Neo and associated Neo ancillaries

Will the Power FC for a R34 GT-T work?

No I wouldn't expect so as it will expect Neo 25t, with Neo injectors, coils etc

You would need to look at either using an RB20 Ap Engineeering PowerFC or do an engine swap

Using an Rb20 AP eng is probably just as hard as the rb20de you have probably still has the R34 traction control etc fitted

so its not just a normal rb20de but a half cast between the RB20 and Neo engine setups

[sl33py]

Thanks Paul!

[Chi100188]

hey Paul..just got a question for ya...my car doesn't idle well...it just keeps hunting even when i have selected the R33 AFM and did the learn idle for 30 mins i've actually done this twice....so yeah i donno where my problem is would you be able to shed some light?

Cheers

Chi

[c0ris]

bought a PFC for a R33 GTR and plugged it into my R32GTR and it wont start just sits at the apexi logo screen. Now i know this is supposed to happen with incompatible hand controllers but this came from a working skyline? any ideas? need help urgently as the car is sitting at the tuners waiting! THanks heaps

[paulr33]

is the PFC combo new or 2nd hand?

if its freezing on the apexi logo the hand controller is the wrong version or its damaged etc

the car probably isnt starting as it needs to be DATA INIT'd and reset to factory defaults like it might have diff injectrs / afms etc

[c0ris]

i bought it second hand off this forum.

hand controller is FCC3 020-17683

and unit is PFC RB26 9802-0032

dont have any boxes just the unit itself.

[c0ris]

from what i understand the R33/R32 gtr pfc is the same?

but from nenguns compatibility table there is an older version hand controller 415-N001 which on works with R33 GTR? The newer model 415-X001 works with both R33GTR and R32GTR, could this be the issue? i thought since the number is FCC3 it was a version 3 hand controller meaning it would be a newer model?

[paulr33]

yeah so you have the older style GTR PFC and the newer style hand controller which is why its freezing at the apexi logo

you need FCC NT hand controller or N001 from nengun's site

32 / 33 GTR PFC is the same, but you need a matching hand controller

if you have PFC RB26 then you need FCC NT or N001

If you have PFC GTR33L then you need FCC 3

[c0ris]

so this would have worked in a 33GTR but obviously not in my R32GTR? thanks for the help buddy! ie. could this combination every worked together or was i sold a bullshit combination that never worked?

Edited December 6, 2007 by c0ris

[Chi100188]

Hey paul i had a question posted up about 7 posts regarding the idle issue was wondering if you could give me some advice in fixing this hunting problem?

Cheers

Chi

[paulr33]

no the PFC you have will work on either R32 or R33

but the hand controller you have is the wrong version of the PFC you have

you need FCC NT or N001

[driftmeister]

Hi Paul

Just a quick question, if i want to swap a RB26 engine (either a 32 or 33GTR) to my current R34 GTT which already has a PFC. Do i need another PFC based on the GTR model or can i still use the GTT? Would my a/c or other electrical works with a GTR PFC?

[c0ris]

yep ok but the combination would have never worked together, so ive been stooged

[chak8080]

Driftmeister, I have a 98 GTT with a PFC for the original engine (RB26DETT(Neo). I did a swap with a BCNR33 RB26DETT but I kept my same PFC and the original wiring harness for the GTT. My GTT runs ok but with many symptoms here and there. My power steering doesn't work (nothing to do with PFC), no a/c (also nothing to do with PFC). Those two things are just compatibility issues. I just need to buy a new pwr steering pulley and an OEM compressed a/c line for a R33 chassis.

Electrical Problems...

My check engine light stays on but there's no problem...

No TCS..

Oil Temp Guage doesn't work.. compatibility issue... aftermarket sensor will fix that.

Theres a compatibility issue with the injectors. The PFC for a GTT runs on a high impedance system, the RB26 motor for a BCNR33 uses a low impedance system. I lucked out, I ordered some Bosch 444cc Green Top High Impedance injectors from the US (cheap but they sell in set of 8.. I just sold the other 2 to my shop), my tuner has a friend who's a Robotics Professor and he built a converter sensor to change the RB26 system to high impedance.

There were trial and error things that I went thru with my air sensor since I only have that one from the RB25 motor. My tuner had to modify the pfc to read the different air flows. We were trying to go D-Jetro but we still need to work things out to see whats best.

I suggest buying the correct harness and cpu for the RB26 motor if you have the loot to do so... you'll eliminate many headaches.

I'm about to get my Tomei 276 l/hr high flow fuel pump installed this weekend. Were expecting ~400whp, 62whp gain from what it is now. All I have is

Apexi Filters (both are for the GTT haha saving money again)

full custom exhaust

FMIC

SARD Fuel Regulator

Exedy Hyper Multi Plate Twin Clutch

Blitz SBC-iD III

HKS Turbo actuators

and the Tomei fuel pump.

Hope my mistakes shed some light for you!

[driftmeister]

Driftmeister, I have a 98 GTT with a PFC for the original engine (RB26DETT(Neo). I did a swap with a BCNR33 RB26DETT but I kept my same PFC and the original wiring harness for the GTT. My GTT runs ok but with many symptoms here and there. My power steering doesn't work (nothing to do with PFC), no a/c (also nothing to do with PFC). Those two things are just compatibility issues. I just need to buy a new pwr steering pulley and an OEM compressed a/c line for a R33 chassis.

Electrical Problems...

My check engine light stays on but there's no problem...

No TCS..

Oil Temp Guage doesn't work.. compatibility issue... aftermarket sensor will fix that.

Theres a compatibility issue with the injectors. The PFC for a GTT runs on a high impedance system, the RB26 motor for a BCNR33 uses a low impedance system. I lucked out, I ordered some Bosch 444cc Green Top High Impedance injectors from the US (cheap but they sell in set of 8.. I just sold the other 2 to my shop), my tuner has a friend who's a Robotics Professor and he built a converter sensor to change the RB26 system to high impedance.

There were trial and error things that I went thru with my air sensor since I only have that one from the RB25 motor. My tuner had to modify the pfc to read the different air flows. We were trying to go D-Jetro but we still need to work things out to see whats best.

I suggest buying the correct harness and cpu for the RB26 motor if you have the loot to do so... you'll eliminate many headaches.

I'm about to get my Tomei 276 l/hr high flow fuel pump installed this weekend. Were expecting ~400whp, 62whp gain from what it is now. All I have is

Apexi Filters (both are for the GTT haha saving money again)

full custom exhaust

FMIC

SARD Fuel Regulator

Exedy Hyper Multi Plate Twin Clutch

Blitz SBC-iD III

HKS Turbo actuators

and the Tomei fuel pump.

Hope my mistakes shed some light for you!

Thanks for your prompt feedback bro..appreciate it. I didn't expect to have quite a number of compatibility issue. I thought if i were to go RB26, the best would be to use the complete harness from the 33GTR and get a PFC for the it. I would presume the TCS & A/c wouldn't be working and a/c require a separate switch for it.

Anyway, now i think it's better to just mod the GTT 25 engine which is less headache. Cheers!

[and3_3]

my r33's exhaust light is on all the time, i couldnt find an answer in ur power fc guide, if its a sensor problem, what should i do if it is? and my check engine light is on a fair bit too, but my knock is under 20. My warning functions r all on too.

[paulr33]

learn how to use ETC, SENSOR SW CHECK to work out which sensor is broken

its covered in the FAQ