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Hi Tom,
in my opinion the engine should run proper just with a failed SAI. Maybe it will run too fat, but that wouidn't lead to a not working cylinder bank. Also the SAI blows air into the complete intake system – not only in one cylinder bank side.
Could a failed o2 sensor lead to a problem with one cylinder bank. I would say yes, but i don't think it could block the bank from running. And that is what it sounds like.
There must be a more fundamental problem.
Regards, Markus
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