plx m300 datalog question
plx m300 datalog question
I plan on hooking up my plx to my ecu so i can datalog...the question is i am running open loop 100% of the time so do i need to hook up the narrowband signal? also what pin does the wideband signal go to and do i need any resistors or anything for only installing that rather than the narrowband?
It would be a good idea to run in closed loop and use the narrow band output from the PLX to the ECU. When you want to datalog Wideband readings you just change the wire and connect the wideband output to the ecu. Details can be found at http://www.hondata.com/techwidebandtuning.html
how does it give better fuel economy without an o2 sensor? im not doubting i just like to learn as i go. i broke my o2 sensor and i dont want to buy another one but if i can run closed loop without the o2 and still run well ..oh wait i think i understand whats going on...the wideband o2 is giveing the ecu narrowband readings to correct from....i was thinking the narrowband was just to simulate so a CEL wouldnt show let me know if i am thinking correctly now..
also i am curious of what the lamda stuff is for.. is that the value the ecu will strive to get by going off o2 readings?
also i am curious of what the lamda stuff is for.. is that the value the ecu will strive to get by going off o2 readings?
i run with my plx in the car all the time...
i used the wide-band side to the ECU, and run open-loop all the time...
as my car is NA, on the dyno make the most power @ 13.6 AFR, so columns 7,8,9 and 10 are set to run @ that, the rest of the map i have set to 14.2
i can tell u it will be a lot of work, but after 2 months, i had the ecu remapped AFR wise by hand. i stay in open-loop to see if there are any spots that can be better, and it feels good drive in something i made...
it is also one of the best ways to learn the software, even now sometimes i will leave the laptop in the car and just datalogg
the hard part for me was setting value less the 1200 rpm...
(traffic driving)
i used the wide-band side to the ECU, and run open-loop all the time...
as my car is NA, on the dyno make the most power @ 13.6 AFR, so columns 7,8,9 and 10 are set to run @ that, the rest of the map i have set to 14.2
i can tell u it will be a lot of work, but after 2 months, i had the ecu remapped AFR wise by hand. i stay in open-loop to see if there are any spots that can be better, and it feels good drive in something i made...
it is also one of the best ways to learn the software, even now sometimes i will leave the laptop in the car and just datalogg
the hard part for me was setting value less the 1200 rpm...
(traffic driving)
Usign the PLX there is no reason not to run in closed loop. WHen you are done tuning switch it to closed loop and runt he narrow band input to the ecu. you can still see the Wideband readins on the PLX display and you can run in closed loop...you get the best of both worlds. I hav ebeen doing this on my turbo b18c5 for well over a year.
what wire should i connect to the o2 sensor input of the ecu from my plx? the gray one or the white one?
can i datalog lambda readings even if i run open loop?
i also run open loop all the time. isnt it that the wb sensor has a limited lifetime? so i only use it in tuning time..
can i datalog lambda readings even if i run open loop?
i also run open loop all the time. isnt it that the wb sensor has a limited lifetime? so i only use it in tuning time..
you wont learn until you actually do it.
The Honda ECU can only understand narrowband input [unless it's a P07 or other ECU designed for wideband input].
The benefits of running in closed loop are better gas mileage...as Spunkster said you still get to see true wideband values from the sensor on your PLX device, but from the box, the signal is emulated to a narrowband output so the ECU can understand it. Instead of you having to constanly watch your wideband meter, your ECU can make minute changes on the fly based on the narrowband info it's being fed, much quicker than you can, yielding better performance all around.
At least set your open loop threshold low so your car can at least run in closed loop at low RPM's.
Honda knew what they were doing when they designed the ECU.
The benefits of running in closed loop are better gas mileage...as Spunkster said you still get to see true wideband values from the sensor on your PLX device, but from the box, the signal is emulated to a narrowband output so the ECU can understand it. Instead of you having to constanly watch your wideband meter, your ECU can make minute changes on the fly based on the narrowband info it's being fed, much quicker than you can, yielding better performance all around.
At least set your open loop threshold low so your car can at least run in closed loop at low RPM's.
Honda knew what they were doing when they designed the ECU.