Yup Dave got it! Actually he's the one who taught it first! :thumbsup:

When I said to fill in spreadsheet with similar numbers after taking out History Average with 5 or less counts... this takes...

There are a lot of stock bins we start with in $42 that are Open Loop Idle. Remember these are truck systems. Back then it stilled passed emissions, not many newer systems... or any I'm aware of run...

I didn't mention Open Loop. That will not give any narrow band O2 sensor feedback so this tutorial would be useless. Open Loop tuning is done with a Wide Band O2 sensor and would need different...

Well last picture says to copy new VE to bin... maybe I should add the last picture and instructions?

It's things like that I need feedback on to further explain or correct, so feedback still...

If you had the data log and used this procedure before a few times it's easy. I can do all the steps above in less then five minutes...

Play back your data log so it fills in the BLM history tables. You can click on the top left cell to highlight some tables, or get used to starting at bottom right and drag to top left to highlight...

Download one of the spreadsheets from your specific ECM?PCM mask ID, there are many available in this forum:...

Now that the VE table is smoothed out we can do some data logging.

To get better data logs there are a few more things to do that helps for accurate data and filling more cells.

Turn off:
1....

There's a lot of questions about how to adjust the fueling VE tables with BLM data so I'm attempting a tutorial to understand the theory. Lots of it takes some practice and understanding of what is...