On the 730 you have the Kpa vs RPM tables.

1. When the KPA is 40 on the lower table does this represent 31-40 or 40-49?

2. When the RPM is 600 does this represent 501-600 or 600-699?

Thanks!

 

AFAIK ... and as far as I have witnessed ... 600rpms represents 600rpms. It's not a range. It's simply 600rpms. Now if the current rpm is 550rpms then the ECM interpolates (draws a line) between the 500 and 600rpm values and then determines what to use. As an example ... let's assume that 500rpms and 40kPa has a value of 50. Now let's assume that 600rpms and 40kPa has a value of 60. Well, if you are 550rpms and 40kPa then the ECM will use a value of 55. Clear as mud?

Tim

 

So when evaluating scans I should only be looking at only 600,700,800.....RPM and 30,40,50.....Kpa (matching the tables) to determine changes to be made (and not use the in between values)?

 

Initially that's fine.
As you get more seat time doing things, you'll find yourself looking at the fuel table to see what it's doing, also.

 

SO the ECM basically interpolates the in between values, based on the nearest available valuea on the table?

 

No basically involved, it's pure interpolation.