Originally Posted by Unclemeaty

I understand. I think I'd try to get a little more specific on precisly which injector needed a boost, and which needed reduction. What you did is probably OK, but what if you lowered one injector in B2 when you should have lowered a different one?

Let me ask since I have not done this yet. If you raise or lower just one injector at a time, does it change how the engine runs at idle? Like, can you tell if the engine gets better or worse? If you can, then you might be able to go through one injector at a time and find the best selection for each.

In my opinion, the injector closest to the firewall which has less airflow and cooling would need more fuel then the ones closer to the radiator fan.