"main injection on time"? what does this mean?
why do we want to log this pid
i hope this isnt a dumb question but i am just getting into the scan tool now...it is incredible to say the least

i wish i would of logged more when i first got efi i did a lot of tune swapping and playing and didnt really do any logging
ow well live and learn i geuss

Main injection on time basically refers to the values you have in tables B0720/B0721, the actual opening time of the injectors for the main pulse.
It is important because that is basically the 'final' say in your fueling.
Most will usually log the Main Pulse mm3 and Injector on time. The mm3 you will see comes from B0727 mainly.
If you do a few logs (or have some sent to you) then you will see when you move the cursor over the charts in the scanner then cells will highlight in the Tuner as to where the ECM was getting it's values from. That may help you understand how to relate the scan data back to the tuner tables.

Cheers,
Ross

perfect thanks ross,
i have lots of logs to go through now i should of started logging from day 1
now what table do i adjust for time travel..????????