How To Install A Powerfc

[d00dz]

Well here is my problem...

Plug in the pfc. The hand controller doesnt turn on. Put keys in and turn it to ACC. The hand controller turns on. Turn off the boost controller unit.

Turn the keys to "ON". At this stage the engine light and the exhaust temp sensor flashes repeatedly and I can hear a tapping noise comming from the fuel pump. Fuel pump seems to prime. I wait awhile crank the engine to try and start it and it wont budge!

Plug back the stock ECU and everything works, car starts, just doesnt like the PFC.

All alarms are turned off. (That I know of)

At first I thought it was a faulty PFC, but I tried another PFC and it did the same thing.

S1 RB25DET 5 Speed Manual.

I have no idea what is wrong. Suspecting its a wiring problem? The stock ECU is an old one with some sort of diagnostic knob at the back of it. :

Edit: In case people dont read this was fixed, cause is explined here: http://www.skylinesaustralia.com/forums/in...t&p=2327813

[2rismo]

The stock ECU is an old one with some sort of diagnostic knob at the back of it.

What the?

Anyone seen paulr33 ?

[d00dz]

Ill take the stock ECU out tommorrow and get some pictures.

Hmm had a re-read of paulr33's pfc faq and this might be my problem?

"Some cars only (for some strange reason) have half gauge wiring running from the battery to the ECU. This works fine for the factory computer but the PowerFC needs the full 12volts. You can simply run new 12volt wire from the battery to the ECU and this should correct this. This problem has been experienced by at least two members previously (both in R33 GTST)"?

[paulr33]

I am unsure how the 12v feed will affect the PFC, other than "it doesnt work", I know the hand controller runs of a 5v feed. Try this.

FC in and hand controller in

turn to ACC

check out SENSOR SW CHECK under ETC

post up what sensors are in black (backlight) highlited

[d00dz]

Hmm ok I have some pics of my "stock" ECU. See below.

This is what I just tried before..

I tried plugging in the PFC again. This time I took note of what happened.

Plugged in the wiring loom.

Plug in hand controller

Disable alarm

Turn the key to ACC. Nothing! Hand controller doesnt turn on! wtf?

Turn the key to ON, Hand controller comes up APEXI Screen then it just freezes at the "RB25DET" screen.

All this is happening whilst the engine light and exhaust temp sensors are flashing and the ticking sound is heard from the fuel tank.

Once again unplug everything and put stock ECU back and everything works fine.

Weird thing at back of ECU:

ECU Mounted:

[d00dz]

Hmm after talking to people. Seems like the pic above is a stock ecu and nothing special about it.

This leads me to the wiring. The plug loom u see there is for the AVCR.

Or possibly the pfc isnt recieving enough volts at ACC to start up?

As the stock ECU only needs 8v to start, while the pfc needs the full 12v?

Hmmmmm

[Cubes]

The PFC h/c and fuel pump prime should only show/be heard when in the on position, then a further turn to start will have the car start, letting go of the key returns it to the on position where the car continues to run.

Check the sensor sw screen and post up ALL of the values, preferably take a photo of the screen and post it.

[Craved]

joel, from what Victor has told me. it stays on the RB25DET version screen and doesn't continue through that point to the menu's. he was able to get in there ONCE while at hitmans to turn off the boost control.

he told me also that the AVCR doesn't have any values for INJ/TPS etc coming to it.

also what i found was strange, he said it doesn't Crank over when turning the key to start.

[Cubes]

ahh no problems...

When my pfc was in for repairs it would hang on the intro screen when it wasn't receiving certian inputs. i.e simply running power through it. Once installed it was fine.

Its also been known for the plug to be slightly off and not done up straight causing it too to hang on the intro screen.

But yes if the avcr isn't receiving values either then something is definitely up.

I would check removing the ecu hasn't broken/distrubed the work done on the loom when the avcr was isntalled.

[Craved]

should have elaborated a little..

the AVCR works fine when using the std ECU, but not at all when using the power FC.

edit - did yours crank over and just not start when your PFC fried ?

Edited July 12, 2006 by Craved

[sinistaGTR]

Have you double checked all the fuses if not it might be fried

[d00dz]

Havent checked fuses.. But with the std ECU works fine.

It may be the PFC simply not recieving enough volts. or wiring missmatch, though I cant see why.

Ill try jump starting it via jumper leads tommorow. Unless its bad to do this. :

It all too confusing right now..

[paulr33]

jump starting it is, but if wont go past the rb25det version display then theres no point. the FC is locking up for some reason.

turn the car off.

hold up on the hand controller

turn it on.

what comes up?

[Craved]

jump starting it is

hope you mean jump starting the power FC and not the car

[d00dz]

Jump starting the car ey?

As Chris says which one pfc or car or both the same? :

Do I do this by placing jumper leads to the terminals and starting another car then start my car with the PFC in?

[ish]

d00dz I wouldnt be experimenting to much especialy with straight power ! I know nothing about this but hard wire jumping the car or Ecu cant be good ... get it tested or give it A fresh 12 volts but lighty fused...

Get it tested Professionaly so you know

You dont want to blow any Warrenties because your frustrated !

[paulr33]

jump starting a car with a PFC is no different to stock ecu.

ive done it before twice and it works just as normal (as its supposed to).

it sounds like you have the wierd wiring (not 12v guage) at a guess

[ish]

Lotta Guessing !

[coastlife]

Hi Guys

had exactly the same prob the little blue relay next to the battery in the boot ticks like mad. iafter ripping half the dash apart and checking all the voltages from the pinouts it was just the fuse the fuse box has two rows top to bottom its the left hand row sixthfuse up runs fine on old ecu -nothing but start screen on PFC

[paulr33]

doodz please try it and let me know. will add to the faq if its the case.

please find out what the fuse is for also and send us PM or ill check back here