o2's at WOT
Thread Starter
Joined: Nov 2001
Posts: 1,934
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From: The Woodlands, TX
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.
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
https://ls1tech.com/forums/pcm-diagnostics-tuning/433395-o2s-don-t-lock-wot.html
Thread Starter
Joined: Nov 2001
Posts: 1,934
Likes: 0
From: The Woodlands, TX
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.
Originally Posted by YellowToy/A
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.
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Thread Starter
Joined: Nov 2001
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From: The Woodlands, TX
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 
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Originally Posted by Bad Habit Bird
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
have you logged your commanded a/f? I'd like to know whats being commanded when your going wot.
Thread Starter
Joined: Nov 2001
Posts: 1,934
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From: The Woodlands, TX
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 
Originally Posted by Bad Habit Bird
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
A4 F-bodies have it at 3200 rpm, M6 is set at 0 (stock tuning)
Originally Posted by Bad Habit Bird
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
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.