Intermittent start and stall when put in reverse

Hi. Good to hear from you again.

Well that is good news and not so good news. So if the wiring is all good then that convinces me that the issue is a spread terminal in one of the connectors. Forgive me if I am getting this wrong as it has been a little while but in reviewing this, if you disconnected them and found no issue with the wiring but hooked it back up and it worked, then it didn't but then it did again, that tells us that we have a loose connection. This would make sense as we seem to have a circuit issue but the wire is fine. That only leaves the terminals.

Do you have the same codes? Any specific circuit codes?

Well, that is good info but it depends on how you tested it. What wire on the coils and injectors were shorted to ground and did you have everything still hooked up? Meaning were the coils plugged in? The only thing they have in common is the ECM but if they were still plugged in, I suspect you were just picking up the ground through the component. It is interesting because the injectors are grounded by the ECM so until they are grounded by the ECM they should not have any ground.