Faq: Apexi Powerfc - Frequently Asked Questions

[paulr33]

if the engine check light stays on it means a sensor is out of range, not working or giving incorrect values. when you see it on, look at ETC, SENSOR SW CHECK and look for any sensor names with a black background around its name. this indicates the fault sensor

if you enable the boost kit for enable and dont have the map sensor harness connected the engine check light will be on and BOST under SENSOR SW CHECK will be highlighted, indicating the boost map sensor isnt working or out of scope (ie: its not plugged in)

[Birnie]

Thanks Paul !

I had a quick look at the sensors but didn't really know what i was looking at. I'll check again and give you some results when i find out.

[markimak]

hey paulR33.

its ok to run the GTST with a PFC. but if ur only commuting will it be economical to run it with the stock ecu. i wont have time or money for a tune. so just wondering. is ther any real world figures. my GTR averages 12-15 p/100kms. what will a base map PFC on a GTST yeild?

thanks again

mark.

[paulr33]

fuel economy should be almost the same if not a bit better

[markimak]

thats what i was thinking myself.

just like to say we all apprciate the write up and effort put into this PFC guide. its the best we could find on the net. and thanks for answering somewhat repetitive questions so promptly. your very appreciated mate.

thanks again

mark.

[Kennedy]

Just installed mine and can I say how much better the base maps over a the standard ECU. Teh car feels so much more reponsive now...shift from 3rd and 2nd and the thing just launches!!!

Now to get a tune........

[Kennedy]

I was wondering if there was a way I could display my oil temp on the PFC. Maybe I could use the Air flow temp function to measure the oil temp via a sandwich plate? Do you know if this is possible Paul?

[paulr33]

on the r33 gtst it is not possible, there is no air temp sensor on the rb25 PFC so it doesn't work, hence u get --- on the display. so in summary, no

[paulr33]

to do:

add in correct boost kit port mappings

add in how to use xf throttle body

[paulr33]

added correct pfc boost kit port mappings (on the solenid)

added photos inside GTR-RB26 PFC

added photos inside APENG-RB20 PFC

added piggbacking the powerfc

added power fc pro launch control

[paulr33]

added boost kit port pinout diagram

added firmware / eprom hacking on the powerfc

[Race_Bred]

Hi there paul, great job on the thread mate its damn helpful, ive just installed my PFC into my r33 GTST 2 days ago with the assistance of your information, the car feels a tad better than the factory computer, im saving to get a tune, hopefully with in the next couple of weeks

I've noticed on start up one of the two relays which are mounted behind where the computer sits, clicks about 4-5 times as soon as i turn the reds on and the hand controller flashes with the clicks.

It done the same thing the morning after the install while driving with the engine cold turning right out of my street it clicked 4-5 times and i nearly got stuck in the middle of the road, once it warms up it doesnt do it while driving, but will still do it on start up, and the hand controller works fine.

I've plugged the factory computer back in just to check if the clicking still occurs and it doesn't.

I also swapped the clicking relay with 3 other relays and they all done the same

The clicking of the relay really has me stumped i cant think what could cause it, but its definately related to the PFC, something is switching the relay on and off really quick, any help you could give me would be fabulous and appreciated

The car is not heavily modified just a full exhaust, FMIC, cold air intake, 10psi boost and a walbro 500hp fuel pump

The PFC was brand spankers in the box.

Thanx again.

[Fry_33]

Hi there paul, great job on the thread mate its damn helpful, ive just installed my PFC into my r33 GTST 2 days ago with the assistance of your information, the car feels a tad better than the factory computer, im saving to get a tune, hopefully with in the next couple of weeks

I've noticed on start up one of the two relays which are mounted behind where the computer sits, clicks about 4-5 times as soon as i turn the reds on and the hand controller flashes with the clicks.

It done the same thing the morning after the install while driving with the engine cold turning right out of my street it clicked 4-5 times and i nearly got stuck in the middle of the road, once it warms up it doesnt do it while driving, but will still do it on start up, and the hand controller works fine.

I've plugged the factory computer back in just to check if the clicking still occurs and it doesn't.

I also swapped the clicking relay with 3 other relays and they all done the same

The clicking of the relay really has me stumped i cant think what could cause it, but its definately related to the PFC, something is switching the relay on and off really quick, any help you could give me would be fabulous and appreciated

The car is not heavily modified just a full exhaust, FMIC, cold air intake, 10psi boost and a walbro 500hp fuel pump

The PFC was brand spankers in the box.

Thanx again.

I could be wrong with this but at least its a quick and simple check to do.

Check all of your fuses below the dash on the drivers side. Don't just check they are all ok, check they are all there. I attached the pic of the english translation of it. I was missing the electrics or engine control one.

Go through the PFC FAQ it has a section on problems with clicking relays

R33_Fusebox_translation.doc

Edited February 8, 2007 by Fry_33

[GTR_Legend]

Just like to say, Great FAQ dude.

Once finding out that the R33 PFC's were being discontinued, i raced out and brought one today, just tuning now. Only paid $1500 so happy with that given the situation.

PS. Anyone looking for one? Maybe contact JJR, i got mine there and there were about 2 more and 1 2nd hand, although the new ones were apparently sold! But still waiting there for pickup

cheers again!

[paulr33]

I could be wrong with this but at least its a quick and simple check to do.

Check all of your fuses below the dash on the drivers side. Don't just check they are all ok, check they are all there. I attached the pic of the english translation of it. I was missing the electrics or engine control one.

Go through the PFC FAQ it has a section on problems with clicking relays

fry is correct, i would start there and check what he has mentioned.

i have never heard or seen a PFC click 3 or 4 times before boot up and come online normally.

usually if you have clicking relays its toast and never works. am surprised it works

only thing i can think of is view SENSOR SW CHECK with the car on ACC and see what it does ?

[juls33]

with the inj settings, they are injector correction

what are the varibles min max

just trying to understand my maps

[Race_Bred]

fry is correct, i would start there and check what he has mentioned.

i have never heard or seen a PFC click 3 or 4 times before boot up and come online normally.

usually if you have clicking relays its toast and never works. am surprised it works

only thing i can think of is view SENSOR SW CHECK with the car on ACC and see what it does ?

i checked fuses in engine bay, cabin and boot, they are all good and can't find any missing

i assume power to the PFC should be well because the factory computer is A-1

is it faulty? i hope not but i need to sort this out because if it is i need to get it repaired under warantee which sux as its brand spankers and i paid 1500 for the damn thing

ive got it booked for a tune on thursday and i just hope they have seen this problem before and hopefully know how to fix it *fingers crossed*

will do what you said in the morning paul sounds a good idea

thanx for your replies guys

[STATUS]

your link to R34 GTR pinouts seems to be down.

Edited February 7, 2007 by URAS

[Fry_33]

i checked fuses in engine bay, cabin and boot, they are all good and can't find any missing

i assume power to the PFC should be well because the factory computer is A-1

is it faulty? i hope not but i need to sort this out because if it is i need to get it repaired under warantee which sux as its brand spankers and i paid 1500 for the damn thing

ive got it booked for a tune on thursday and i just hope they have seen this problem before and hopefully know how to fix it *fingers crossed*

will do what you said in the morning paul sounds a good idea

thanx for your replies guys

Just because the factory computer runs fine doesn't mean the Apexi will. My car with standard ECU was running fine without the fuse I mentioned, the apexi wouldn't work. The standard ECU's tend to be less fussy with some missing signals and weak power.

If all your fuses are there and fine you may need to start looking at your wiring.

Pin 58 (black with white stripe wire near bottom of harness i think) needs to have a good 12V going to it. Just unplug your ECU harness and check this with a multimeter.

While you are at it check pins 50 and 60 (2 black wires on the bottom of harness I think) and make sure they are good earths.

Thats a starting point.

good luck

[paulr33]

updated to include bankruptcy notice