My Car Thinks Stoich is 15:1

[mr.prick]

I found this post confusing.
Are you using the LM-1 PID ({EXT.AD}*10) with different analog output settings?
If this is the case these settings:
0.88333v @10:1 AFR
4.21667v @20:1 AFR

are the same as:
0.00000v @7.35:1 AFR
4.21667v @20.00:1 AFR
Which is the same as ({EXT.AD}*3)+7.35 and matches the LC-1 PID not the LM-1 PID of ({EXT.AD}*10).

[RevGTO]

Well, you can never be 100% sure, but I reprogrammed the wideband for 14.6 and did a free air cal ... came out just right at 20.9.

If all else fails, I'll do the full reflash as you and Joe have suggested. The thing used to read 14.6-14.7 before my old laptop died at the end of track season last year. When got a new one and resumed tuning this spring, one of the first things I did was download and install the .cax file for lean cruise. I can't be sure if it was cause or coincidence, because that's when I started logging and getting stoich in the low 15's.

That's when I started with CalcVE which allowed me to get my LTFT's dialed in like never before. But logged AFR stays on the same baseline no matter what I do.

[RevGTO]

I found this post confusing.
Are you using the LM-1 PID ({EXT.AD}*10) with different analog output settings?
If this is the case these settings:
0.88333v @10:1 AFR
4.21667v @20:1 AFR

are the same as:
0.00000v @7.35:1 AFR
4.21667v @20.00:1 AFR
Which is the same as ({EXT.AD}*3)+7.35 and matches the LC-1 PID not the LM-1 PID of ({EXT.AD}*10).

If I understand your question, the answer is "yes." They are similar to the LC-1 settings. I followed 5.7 Ute's advice and it got my logged AFRs to match the meter readings on the LM-1. It's a long thread but you can follow his logic there. All I know is that it worked.

[WeathermanShawn]

Yes, I am confused also.

Since tuning is so 'sensor dependent', when things get illogical or too confusing..I try to go back to basics.

More than once I have restarted my entire tuning program from step 1. Flash in the stock tune, do AutoVE or WeathermanShawn's Tutorial, put in new sensors, check plugs, vacuum, exhaust leaks, etc.

We are so wideband dependent (a good thing) that if it is not accurate..we have a bad tune.

I also use Innovates LM-2. I calibrate it (reads 20.9). But I still replace the sensor about once a year. I try to match it up with IBPW at various RPM's and MAPS to check my overall fueling.

I'll stick with the theory that the wideband sensor is not giving a representative reading. If you are commanding 14.63 AFR and reading 15.0, I would put a 75-80% probability that the wideband reading is not accurate.

I am not an expert on it..just my opinion. It would be a shame to not tune correctly due to an inaccurate sensor.

I would trust Mr. Prick's calculations. He has done good work on this area of tuning. Let us know how it goes..

Tuning Enthusiast..

..WeathermanShawn..

[RevGTO]

There's definitely truth in what you're saying. Just resetting the LM-1 to 14.6 from 14.7 brought me down to a 14.85 average. It's an .03 error to the rich side vs. .07 to the lean side, but closer overall.

Went to the track tonight. I'm going download and post up a pass where you can see how crazy I am in PE.

I think you're right and I need to start all over again and do AutoVE. Thanks to all you guys for your good advice, and sorry to be a nuisance on this board with my jacked tune.

[mr.prick]

The easiest way to fix this is to restore the default settings of the LM-1 and
use the WBO2 spreadsheet to edit the sae.generic.txt

[WeathermanShawn]

I think you're right and I need to start all over again and do AutoVE. Thanks to all you guys for your good advice, and sorry to be a nuisance on this board with my jacked tune.

Your not a nuisance. If I or someone else sounds annoyed, it is because we share your frustration.

I actually think you have shown good persistence and understanding. An area 'we' do not talk about much in tuning relates to injectors, fuel pressure, etc. Its possible that a lot of irregular fueling during PE comes from even the stock injectors not 'being perfect'. I do not address it in my Tutorial as it seems to be an advanced topic. But if airmass is spot on and fueling is not..one wonders....

Later..

[RevGTO]

I just realized that unless you have my LM-1 settings in your sae_generic.txt file, the logged AFR's won't display properly, so no point in posting up a log.

The easiest way to fix this is to restore the default settings of the LM-1 and use the WBO2 spreadsheet to edit the sae.generic.txt

Before changing my LM-1 and sae_generic settings to what I have now, my logged AFR's differed considerably from what the meter read on the LM-1. At least they match up now. But I can play with your system. Certainly it seems like the right way to match WBO2 output to B3601. I may need to PM with questions ... I am a math and excel idiot ...

[mr.prick]

Yep.

[joecar]

Hey, if you don't persist you'll never solve the problem...