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Is this on a roots blown motor?If so maybe it is the intake manifold distribution I seem to remember that the roots blown motors do that, load up the rear cylinders on the passneger side bank

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No, this is a turbo engine running electronic fuel injection. The manifold is dry. Each cylinder has a fuel injector that sprays fuel directly into the intake port at the back of the valve.

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I think I would try rotating those two injectors to the other side and see if the problems follow those injectors or not