Any idea why this OEM table is so strange?

[GoneNomad]

Seeking help from EFI tech support...

Why is this 3500 LMM van high altitude table (in the unmodified oem tune)

is so different than the low & medium altitude tables?


Also, none of the tables for an LMM 3500 pickup or 5500 Topkick are like that:


THEFERMANATOR suggested elsewhere that this could just be a mis-scaled table.

But the table data itself matches what is shown on the map of that table:


My concern is that there may have been some type of read or interpretation error between what is actually on the ECM and what shows up in the table in the .tun file. I did read the oem tune off the ECM three times, and in all cases this table is the same, so at least it's consistent.

If this table does have erroneous data in it, I could run into a problem even if I flashed the same .tun back to the ECM.
But in this case I might not ever see any adverse effect unless the vehicle was at high altitude.

Any suggestions would be greatly appreciated...