Pfc Setting On Rb26

[neshgtr]

hi guys,

i have read the PFC faq.. for all RB26 owners.. wondering if you have set the O2 sensor reg. (on or off).. this is below the O2 feedback setting which i have also turned on.. initially it was off and after 30 mins of ecu learning.. it sounded like wrx with its zorst note.. on a side note, car is currently leaking oil from driver side somewhere so further testing on hold atm.. any pointers on where to look.. check oil filter and no sign of oil there.. perhaps a tear in one of the pipes on that side that leaks under load..

cheers

nesh

[paulr33]

it should be on, and is on by default

it enables 02 feedback, which is fuel economy correction/adjustment on light cruise

the ecu will look at the stock 02 sensor sensor on light cruise and use that information to save fuel

[neshgtr]

hey paul, thanks for the reply.. wen i resetted the pfc initially, O2 feedback sensor was ON, however there was another setting below it, O2 sensor reg which i assume is a regulator etc.. this was OFF by default and i was wondering if that could be the cause of my weird zorst tone.. car doesnt hunt on idle but clearly lacks power.. do u think i need to reset the ecu again and have the O2 sensor reg. turned ON and then have the car re-learn over 30mins? sensor status on the hand controller shows all clear and working..

[paulr33]

ah you are correct wise one

the BNR32/BNR33 powerfc has

02 feedback

and

02 reg on/off

the 02 reg on/off translates to

"Rides in BNR32 as for the customer who < Ant > Please set."

the only thing i can think of that would be related would be the fact the bnr32 uses titania 02 sensors, whereas the bnr33 does not

so it guess its some sort of extra mode to make the bnr32 units work corerctly, as bnr32 and bnr33 have same powerfc but different 02 sensor types

[neshgtr]

umm i guess only way to find out is to turn it ON and see if it makes a difference.. was reading PFC hand controller manual for RX7 and instructions for resetting of PFC via controller said selecting YES followed by Ignition switch OFF -> ON.. i didnt do the final step wen resetting my ecu as i was following ur guide and i think it didnt list it.. i hope i wasn't running the car with the previous map still on it as it was tuned for 370kw+..

[Guilt-Toy]

i think you will find that the 02 feedback is mainly for emissions

if you turn it on you get worse fuel economy and the car runs around 13.2 - 13.8 a/f ratio.

i even tested this theory on the RTA epa test and you can see it only changes the emissions and makes it run richer.

i have mine turned off at all times but had it on when i passed the emissions test