Individual vs global ignition corrections

[Stkid93]

Does anyone know exactly what global ignition correction is? I assume it’s all 4 cylinders put into 1 reading so you can free up the accessport for other readings and don’t need to have 4 of your datapoints taken up by all 4 individual corrections. And I assume if you are on global and any of the cylinders have corrections it will show up on global:

but I have read on a post where someone said not to use the global reading as it doesn’t work well or something? Or it won’t pick up corrections from the cylinders every time? I can’t remember exactly what they said.

 

[gtx3076]

I've assumed global is the sum of all cylinders as well, which I don't see a much benefit because corrections are done all the time. I monitor each one individually. Again, I don't actively watch them, but I will check them on occasion just to check in on the car. Plus, a -1 correction vs -4 correction won't be seen by a global count.