you will notice the EXT.O2.LAMBDA reading reads 1 for a while. It was still warming up. I ran through it quickly.. this was more of a test than anything (at idle)
MAF Log 001.efi
you will notice the EXT.O2.LAMBDA reading reads 1 for a while. It was still warming up. I ran through it quickly.. this was more of a test than anything (at idle)
MAF Log 001.efi
Last edited by 08z06; April 30th, 2015 at 06:37 AM.
and wow... I just modified the B8020 and B8021 tables and it made my VVE table look terrible. I don't even feel comfortable throwing that in my car after the modifications it makes to the coefficients. What do you do there?
Edit: Nevermind, I am leaving my B8020 and B8021 tables. They hit all the RPM's and kPa's in the VVE table. I'm going to apply BEN Factors and see where it gets me.
Last edited by 08z06; April 30th, 2015 at 07:41 AM.
Well, I am finding that when I disable the MAF and run my car it leans out quite a bit. I was driving and would see 16-18AFR depending on the speed and throttle. Also, my idle is ramping up and what not. I put my stock tune back in and my LTFT's were up around 27%.
I am worried about driving my car when its that lean. I'm not hammering it of course, but that's pretty lean. Suggestions?
Looks like SAE.LAMBDA just stays at 1.000... do you have any logs showing it moving...?Originally Posted by 08z06
Also, simultaneously, also log E38.AFRATIO_DMA.
The logged pid GM.FTC does not look right (value is 37...?).
I am not sure why it's reading 37 honestly. How do I go about diagnosing that issue? What shoudl it be reading?
Can you lock out the engine to run off maf only? Or does it always reference the VVE table.
Last edited by 08z06; April 30th, 2015 at 11:46 PM.
The dynamic airflow threshold RPM is set in B8024 and B8025
when rpm reaches/exceeds B8024, MAF-only is enabled; when rpm falls below B8025, MAF/VE is enabled;
MAF-only: MAF is used always.
MAF/VE: MAF is used during steady airflow/throttle, VE is used during transient airflow/throttle.
MAF/VE mode is aka dynamic airflow mode.
To disable VE, set B8024 to 400 rpm, and B8025 to 300 rpm.
how lean is too lean when driving to collect data?
new SD tuning file.... looks much better... my idle needs some work though,
SD tune long drive 20150501.efi
Well, I got the VVE tables reading pretty good. Started on the MAF and my idle speed has been jacked up. I assume that is because my MAF is now reading a lot more air at idle and after adjustments I dropped those values? I was planning on editing the minimum airflow table for neutral and park. Thoughts?
Posting Permissions
Reply With Quote