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I’m having a little trouble following this…
Do I have this correct?
1. You initially have bank 2 rich, bank 2 rich large deviation, and misfires on 7 and 8.
2. You replace spark plugs and coils on 7 and 8.
3. You now still have bank 2 rich and new misfires on 1, 2, and 4 but no longer 7 and 8
The bank 2 rich sounds like injectors to me, unless you have a leak between the turbo outlet and the cylinder.
The misfires could be plugs or coils (what did the plugs that came out look like?) or could also be coils that aren’t all the way on the plug or the connectors to the coils aren’t 100% inserted. It’s easy to be just a little bit off and not notice.
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