Leaning out during normal operation

[Alvin]

O2 sensors plugged in (they do not need to be screwed into the exhaust) will stop it from endless-looping the cat/O2 tests. If it runs the tests and fails it'll stop trying. If the tests can't complete it just keeps trying over and over and over.

I'd not recommend that. I had one recently where the customer left them on the outside of the exhaust and it caused a odd issue. I made a post about it a couple months ago

here it is..

https://forum.hptuners.com/showthrea...-open-throttle

not saying this one is guaranteed to do it. I'd avoid doing it.

[mastersorbet]

Do you have an HP tuners interface yourself?

Yes, still have the original MPVI. Haven't upgraded yet.

[Hondaeater]

I wasn't sure if you could load the tunes or your tuner has to do it. I look forward to your logs using my channels, to see what fuel status is while 16.00 AFR is commanded

[mastersorbet]

I wasn't sure if you could load the tunes or your tuner has to do it. I look forward to your logs using my channels, to see what fuel status is while 16.00 AFR is commanded

I was able to log a run. I'm attaching to the message along with the tune that was used for the drive.Forum request w channels 1.hpl2bar OS_MAF Enable_BTR Stage 1 Blower Cam_Novi1500_LT_60# Injectors Scaled 75%_v003.hpt

[mastersorbet]

I was able to log a run. I'm attaching to the message along with the tune that was used for the drive.Forum request w channels 1.hpl2bar OS_MAF Enable_BTR Stage 1 Blower Cam_Novi1500_LT_60# Injectors Scaled 75%_v003.hpt

I forgot to mention, the commanded lean condition came in at 12 min, 31 sec in the log time line.

Thanks

[mastersorbet]

Update:

Installed rear O2 sensors as suggested and the problem is gone. I did threaded them properly into the exhaust and routed all the cables accordingly . I was honestly going to hold off on that but after searching deeper and finding some other gen III owners complaining about the same issue and getting the same suggestion, I decided to follow through. Here is a log of a regular drive for your viewing pleasure. Thanks to everyone who commented and provided help.

Forum request w channels 2 (Rear O2 inst).hpl

[Hondaeater]

I'm glad it worked out for you.
The classic cars that I have LS swapped didn't have any issues commanding a different AFR than stoich, but they weren't emissions compliant they were antiques. Removing sensors, turning off COT and secondary o2s in the DTC has sufficed.
Cheers.