Wiring For Closed Loop

[BigGameHit]

Hello

I have been searching and found nothing in relation to my question. Just a few key words here and there and other very useful info.

I just installed my M-300 plx wideband. I have the schematic to wire in the analog signal for closed loop operations.

to anyone who has done this... did you wire in the 20ohm resister and if so where did you tap into. I see nothing listed under the rb25's ecu pinout for o2 heater. I was thinking it could be for an RB26 setup.

I'm running Power FC standard with FC datalogit.

ps

could I also just insert the analog wire from my plx analog output into the FC datalogit analog input?

[JonnoHR31]

not sure how those widebands need to be wired but for any wideband it should be a simple case of wiring it up to switched and fused power for the controller and the heater then using the analog ouput(s) for closed loop or for your datalogit. heater power doesnt have to come from the ecu

if it has 2 programable outputs, use 1 as a narrowband signal for the ecu (make sure its turned off while tuning) and use the other as a 0-5v into the datalogit for tuning

Edited December 6, 2009 by JonnoHR31

[BigGameHit]

Roger that.. yea I remember reading to turn 02 feedback off while tuning lol... I forgot to do it the other day and the wideband froze up.

thanks that is pretty much what I thought, just wanted to clarify before I went and blew up my PFC.

ps

does NOVA stand for Northern Virginia?? if so im from Maryland and I use to hang out with the slideways crew while there. I think I seen your car on a U.S east coast forum before.

Edited December 6, 2009 by BigGameHit

[JonnoHR31]

wideband shouldnt freeze, just trhe readings will vary as the ecu trims and adds fuel using the narrowband signal.

nova is my daily car, i live in western australia

[BigGameHit]

yea it was a quick glitch.

I ran aem wideband on my ka-t I already like this plx more.

[D_Stirls]

these might help;

RB25DET_ECR33_Pinout.pdf

Seems to me that pin 29 is the signal wire (i know this is correct)

Pin 115 is the O2 sensor heater ground

the Heater power comes from Pin49 which is the ECCS relayed power

[BigGameHit]

hey thanks a lot brother. I feel super noobish now. I preach for others to use the FSM lol but I neglected it hhahah.

Thanks