Narrowband Simulation Wiring

[limited cv8r]

I think the signal voltage is 450 mV , not 4.5 volts.

[ringram]

Hmm, I think the PCM pumps 4.5v into the NB which then puts out 0-1v
I could be wrong.. but thats what I recall from installing mine.

I stand to be corrected however.

[limited cv8r]

There's a good chance that I could be wrong, been a fair while since I tried to do this myself, hmmm got me thinking now

[Ninety8C5]

I'm thinking of getting a PLX, but want to leave the 20 ohm resistor for the heater circuit out. If I turn off the DTC's for the narrowband heater will the PCM be happy?

[NewV]

I'm thinking of getting a PLX, but want to leave the 20 ohm resistor for the heater circuit out. If I turn off the DTC's for the narrowband heater will the PCM be happy?

Thats what I am running now, works fine for me in Open Loop. If you go back to Closed Loop I don't think it will like it. I'm guessing the fuel trims on one bank would be way off.

I posted this question on the PLX board, I'll let you know what I hear.

[FreddyG]

I've been watching this post and was wondering if you've heard anything from the PLX board yet concerning the resistor?

[NewV]

I've been watching this post and was wondering if you've heard anything from the PLX board yet concerning the resistor?

Nope still nothing. Great products but they could seriously learn a few things from the EFILive board about customer support over the internet.

[Doc]

Nope still nothing. Great products but they could seriously learn a few things from the EFILive board about customer support over the internet.

The few, the proud, the LIVE

[NewV]

Update for interested parties:

Still no word from PLX but I did locate an older post on their board that implied if you could turn off the DTC codes you did not need the resistor.

I finally got around to wiring up the NB simulation last night and my permanent install. A Cadillac looks so much cleaner without cables running thru the top of the hood and into the door crack. Not to mention the mess on the passenger floor.

This AM I threw in my pre-AutoVE tune just to test out closed loop and the NB simulation. I DO NOT have the heater resistor installed but DO have the NB simulation (grey) wire, wired into the factory O2 harness via the "Pos B Ppl/Wht O2 High". Before I threw the tune in, I did disable the reporting and mil for P0053 and P0135. I did a quick test with the reporting enabled and P0135 was thrown.

Happy to report it does appear to work as advertised although I am running lean. Of course I don't have any old logs that tell me if I was running lean or not as it was prior to the WB install.

Log file attached for your viewing pleasure.

[FreddyG]

Thanks for keeping us posted! This is Very good info to know and I'm pretty sure that you just made up my mind as to which WB02 that I'm getting!

Thanks again!