Faq: Apexi Powerfc - Frequently Asked Questions

[paulr33]

Paul,

Would a dodgy AFM cause major knocking in the range of 70-90?

unlikely so i would say no, read the PFC FAQ

theres lots of topics covering knocking and how to test and deal with it

[and3_3]

Does a power fc'd skyline need regular "tuning", like changing the oil every 5000 ks?

[paulr33]

Does a power fc'd skyline need regular "tuning", like changing the oil every 5000 ks?

of course

normal maitenance should still apply for the car

if the car is putting out significantly more power than std more attention should be given to service intervals and quality of fluids, items used etc

[and3_3]

No i mean going over the tune of the ecu again, like defragging a computer every so often.

[paulr33]

no, you dont need to go over the tune every now and then, the tune is static once it is set

as long as the engine parameters dont change, it should be fine

[almzro3e]

paulr33 perfect jop

its really great thing i read it all and i learned many many things

espicealy about knocking

finally your effort lighted up our way in dealing with power fc

[lunjiaow]

Is there a way of disabling one cylinder through the power fc making the whole engine run on 5 cylinders?

Went to get my car tuned, but they never tuned it as my engine was running 5 cylinders.

[paulr33]

Is there a way of disabling one cylinder through the power fc making the whole engine run on 5 cylinders?

Went to get my car tuned, but they never tuned it as my engine was running 5 cylinders.

there is no such feature, the only way you could achieve this would be to unplug one of the coil pack leads

[Dani Boi]

Hey paul,

I've notcied that on my powerfc controller that my knock "figure" has disappeared... I still get the knock bar I just dont get the knock value. Any suggestions?

This problem only happened when i was driving home in flooded roads and I had hit something which made a pretty big thump but at low speed (mabye 10-20km/h) which has then caused my immobiliser light to come on whilst driving and now my alarm/immobiliser doesnt work.... Would this have something to do with the missing knock figure because I havent touched the pfc controller since I got it tuned...

[HOCKO1]

Hey guys i have just put a power FC In my R33 and i am having trouble with the fuel and ignition map when i adjust them and then select previous and exit the maps then return to the maps the adjustments i made are gone just wondering if any one can help me

[paulr33]

Hey paul,

I've notcied that on my powerfc controller that my knock "figure" has disappeared... I still get the knock bar I just dont get the knock value. Any suggestions?

This problem only happened when i was driving home in flooded roads and I had hit something which made a pretty big thump but at low speed (mabye 10-20km/h) which has then caused my immobiliser light to come on whilst driving and now my alarm/immobiliser doesnt work.... Would this have something to do with the missing knock figure because I havent touched the pfc controller since I got it tuned...

when viewing knock in 1 CHANNEL display press UP for digital top score

[paulr33]

Hey guys i have just put a power FC In my R33 and i am having trouble with the fuel and ignition map when i adjust them and then select previous and exit the maps then return to the maps the adjustments i made are gone just wondering if any one can help me

i've replied to your pm - when you edit a value on the INJ or IGN map you need to confirm the change with NEXT (PREV will back the change out)

so edit the value, press NEXT and it will save the change you have made

[guricha]

i've replied to your pm - when you edit a value on the INJ or IGN map you need to confirm the change with NEXT (PREV will back the change out)

so edit the value, press NEXT and it will save the change you have made

paulr33

Hello, i wrote you few time and sorry for disturbing but i need help, i need to tune somehow PFC but i dont know how to:( i read manual but no sence:(

here is list what i have instale on the car it was absolutly stock when arrived

FC

front mount plenum

KKR480

intercooler

full hightflow exhaust

injectors maf and pump is stock

so here is my problem i cant close westgeit because of othervise boost goes up now i have arraund 15PSI but turbo opens at 4500 RPM and eache run up i have erraund 90 knock, fc is absolutly not tuned just moving timing at 6 degrees and thats all

if you can help or give some nmaps that i could enter in fc it could be great or suggest someone who can help me... car is runing well its much faster than M5 E60 but still FC isnot tuned and i know its not good for engine

Please Help

[Boostkid]

hey mate. Just wanted to say great piece of work. Good info etc

Finally got around to installing my PFC. Bloody S14 and their required wiring changes haha.

Gets tuned next week hoorah!

[Robo's]

Any other recommendations for a unstable and sometimes high idle (1000rpm)

I have leaned the idle right out and it definately helps when rolling to the lights as before it used to rev up and down. Now at idle, sometimes its fine at 700rpm but generally its around 900/1000rpm and sometimes back to 700rpm, but the majority of the time its high, seems to have a mind of its own.

Any recommendations as i dont want to reset it.

[Proximity Motorsport]

Hey,

With a r32 gtst and rb26dett ecu.. I am having troubles with speed read out. It sais up to 900km per hour when only doing 100 sometimes it works good and others none at all. Any idea??

[paulr33]

Any other recommendations for a unstable and sometimes high idle (1000rpm)

I have leaned the idle right out and it definately helps when rolling to the lights as before it used to rev up and down. Now at idle, sometimes its fine at 700rpm but generally its around 900/1000rpm and sometimes back to 700rpm, but the majority of the time its high, seems to have a mind of its own.

Any recommendations as i dont want to reset it.

when you encounter the high RPM issue check out SENSOR SW CHECK and see if anything out of the ordinary happens

maybe leave that screen open and watch if you see the issue about to occur

other than that all i can suggest is maybe clean AAC, check leaks etc, check TPS, check throttle body

read the nissan service manual for idle related issues and lastly a reset as a last resort (get someone to copy the tune before you do)

[paulr33]

Hey,

With a r32 gtst and rb26dett ecu.. I am having troubles with speed read out. It sais up to 900km per hour when only doing 100 sometimes it works good and others none at all. Any idea??

the only thing i can suggest is check the speed sensor wiring

[NoFX_Hardcore]

Not sure if this has been asked but I don't have time to read through 21 pages so...

Can the 3 or 5 pin harness for the boost reading work on any pfc or just the d-jetro? Also, what else do I need to hook it up apart from this harness? Vacuum hose etc??

[bilbo117]

Not sure if this has been asked but I don't have time to read through 21 pages so...

Can the 3 or 5 pin harness for the boost reading work on any pfc or just the d-jetro? Also, what else do I need to hook it up apart from this harness? Vacuum hose etc??

hello stranger

Small world isnt it!

Im quite sure you can use the boost reading on any pfc. I know mine is 3 pin and the socket is on the back somewhere. In my pfc boost controll kit it came with the sensor, which is wired in and hooked up to the manifold pressure. Im unsure of the signal type this sensor uses and what else you could use but i imagine there'd be something else out there. . . .