o2's at WOT
 

I just got my HPTuners in this afternoon and logged a WOT run. The o2's should be around .890 or so correct? What would cause them to bounce back and forth like this at WOT?

This is on an 04' HD with a 6.0 and 4l80e.

thanks for any input.

You'll find your answer here.
https://ls1tech.com/forums/pcm-diagnostics-tuning/433395-o2s-don-t-lock-wot.html

Thank you for the help. Is there a way to change this with HPTuners? From what was posted in that link it looks like you have to have something else to fix this issue.

I guess you can only hope HPT will add that parameter in a later version. They have a section on their forum where you can ask for features to be added.

Not in PE. What fuel cell is it?
It's too lean for WOT, I would take it easy until you solved the problem.

I cant tell for sure but it looks like u dont go to 100% until the very end of ur run. What i can see looks ok.

hes 100%tps from ~frame 55 on up from what I can see...what i find weird is that his IPW's are at 17-18ms yet the o2's are bouncing around as if hes not in pe. Just odd.

In the link that 2xLS1 provided it is stated that the truck has a 60 second delay before it will go into PE and I need to lower this delay time. I can't seem to find this option in HPTuners though :confused:

have you logged your commanded a/f? I'd like to know whats being commanded when your going wot.

Is this 60 sec delay only on certain year trucks? :confused:
I don't seem to have this issue with mine.

I actually found the fix for the problem I was having, there is a setting for "PE Enable Delay RPM" I set it down to 1800 rpm and now at WOT the o2's stay right around .890 - .900 :)

How much was it before?
A4 F-bodies have it at 3200 rpm, M6 is set at 0 (stock tuning)

How much was it before?
A4 F-bodies have it at 3200 rpm, M6 is set at 0 (stock tuning)

RPM delay is not used on car calibrations. I question it's use on Truck calibrations also. I have logs of a 03 5.3L Truck with a RPM delay set at 5000 where it clearly went into PE mode at 3000 on 5 dyno pulls. That truck's calibration had a PE delay od 2 seconds and the logs show about a 2 second delay. I've looked at a few 03+ 6.0L calibrations and it seems the LQ9s have the time delay set at 0 and most, but not all LQ4s have it set at 60 seconds. The one LQ4 that had a delay of 0 was in a Hummer.

Mine was set at 5500 (which I never reached)