I hooked up my ZT2 to the ecu today, disconnected the narrow band as per instructions here. When I went to set up the signal through the logger I get the error ""This Zeitronix device does not support setting linear wideband output". Any ideas whats wrong?

 

So when tuning to get the a/f leaned out. The only way is to tune the open loop settings? There is no way to change the 14.7 target in closed loop that the ECU is looking for? So for example the ECU monitors the o2 sensor in closed loop for a target 14.7, cant we some how change that target 14.7 so that its target becomes example 15.5 ?

 

Yes, thats exactly what this patch is for...

https://www.evolutionm.net/forums/ec...o2-system.html

 

The ECU isnt looking for 14.7 AFR, its looking for a 1-2 volt signal comnig from the oxygen sensor. Its the oxygen sensor that is set to give off a certain voltage at 14.7. The ECU doesnt know what the AFR is it only knows if its too rich or too lean based on that switch over voltage sent from the Oxygen sensor. What the Narrowband simulation feature of Aftermarket O2 sensor does is move that signal around to guide the ECU into a leaner or richer condition.

 

Thank you for the link. But it kind of sucks since its a necessity to wire an analog output from a WBO2 controller into rear O2 ADC input the ECU.

Thanks for clearing that up. I was thinking narrow band that the signals in which the ecu looks for would be a little more broader than 1-2 volts but off course not as broad as a wideband.

I guess there is no way other than wiring into a wideband for closed loop or not wiring into a wideband but running open loop tables after modifying load tables.

 

It would be interesting if someone made a narrowband with a switching point of say 15.5 or something like that. So that you could just install that and call it a day.

 

then your fuel trims will be off?

 

I've been going back and forth in the program HP tuners in a ZO6 to remedy the same issue.

I haven't used the ecuflash yet, but it definitely does not seem as versatile as I had originally thought.

I'll keep reading and looking.

Can you just turn off closed loop?

wp

 

yes

 

Several wideband controllers appear to support simulated narrowband signals with programmable response, such as recent versions of the Zeitronix ZT-2 (see http://www.zeitronix.com/questions/NBpoint.htm) and various TechEdge controllers (http://wbo2.com/).

EDIT: missed an earlier post that indicates this isn't news to you...

 

well if you can turn off o2 LT/ST, can't you turn off p0300,01,etc.

What about actually changing the o2 switch point?

I may have missed that post; I'll go re read this thread again.
wp

 

there's the switch point, and yes the p0's can be configured

 

full time open loop set FAA bit 4 = 0
p0300 codes FCA bit 4 &5 =0

 

that will make your car in open loop all the time under any and all conditions.

 

I was thinking about this, and if you where to say set your wideband switching point to say 15.5 and then modify your fuel map in all the 14.7 to be 15.5 would this result in your trims being close to what they would be normally?