If you have questions on specific settings or what not just post up.
It may seem overwhelming all the info., settings etc. but lots of reading the manual a few times may help?
EFI is very dependent on good grounds, and good voltage.
Any fluctuations affects all functions of system operation.
If voltage drops fuel pump output changes, injector output changes, sensors provide ecm with different values etc.
So be 100% sure it's all good.
'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon