Using the wb-02 patch for $58, if the wb is not connect to pin F14 (cuz its still in the innovate box on my desk) is it normal for the log to show a target afr of 10 ?

Also, I used to go by the target AFR field to tell when the car was in AE or PE, warmup, etc. Is there any status bits I don't know about for telling when a car is in AE, or PE ?

-- Joe

 

I believe that the log showing an AFR of 10 is fine.

With the pin left unconnected, it likely has a pull-down resistor which would result in the voltage on that pin being 0.0. And I suspect that the lowest AFR value in the lookup table in the patch is probably 10. Thus it's probably fine, though I say that without any direct experience with $58, any specific wbo2 patch, or the innovate box.

I did happen to post (a long time ago) my version of the WBO2 logging for '730/$8D where I reported the AFR value in the fuel pump voltage slot because (like you), I actually was using the "target" AFR report for tuning purposes.

I'm not sure why most don't make use of the target AFR. Sure, it doesn't report actual AFR, but it DOES report the AFR (under steady state conditions) that the ECM *thinks* it is achieving, and provided the VE table is accurate for the given RPM/MAP, it should be right on. math is math. So it's a great tool (in my opinion) to compare to WBO2 data to find data in the VE tables which is "off".

 

In case anyone is interested, here's the link to that post:

https://www.thirdgen.org/techbb2/sho...hreadid=212587

 

The code used by 1981TTA for the $59. Was the same as the posted $58 patch I think. The one on NWSTP. Never verified
it though.
It has a hi and lo limit of 20 & 10 for AFR built into the code.
It was set up for the default of 1-2v input for the Innovate stuff. 1981TTA may have changed it though from whatever the original post used. The 8D version doesn't use a table. It calcs the AFR and has limits for the result.
But it wouldn't suprise me if the code had a built in limit.

 

Hooked up the wideband. Calibrated it, and went for a cruise with a buddy. For now, just using logworks. I connected the wb-02 to the ECM today but han't went for a cruise yet. Wanted to use inovates logger just to verify acuracy.

Well, Narrowband o2 sensors suck ***.

My car thinks its between 125-129 blm everywhere. Hah!

On idle, most cruise it was 20:1 afr.. WTF!!!!

PE/WOT it was 18:1..

Hope I didnt break anything.

 

where'd you put the wbo2? is it downstream of the cats or an AIR injection point?

those AFR's seem suspect.

 

About 8" from the Y, prior to the cat.

-- Joe

 

I checked out your page. Hmm, got a few modifications there. I'm guessing the AIR is gone.

I'm not familiar with how WBO2's respond on a boosted application so I don't know if those numbers are actually suspect or not, but am interested to learn how this turns out.

 

Have to be pulling air from some where.
Do you have 2 sensor bungs?

 

I have a bung in the collector for the narrowband sensor.

There's prolly a leak or two in the y-pipe. The welds are not perfect.. But you'd think thered be so much backpressure that it wouldnt pull any air in?

-- Joe

 

If u have ANY points for air to leak into the exhaust ahead of the sensor it is a waste of time :-)

Anything will throw it off, the wideband is even more sensitive to it that the stocker.

Any leaks in y-pipe, header, or flanges and u will show a significant offset in the AFR towards the lean side. Also, AIR piping if u have it or deleted and welded it.

Fix those leaks and u will get a real AFR

later
Jeremy

 

Hrmm.. I guess I'll give it a whirl this week.

-- Joe