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Hello, how many miles are on this vehicle? Do you have a chip or programmer installed?
Ok the best way to diagnose is with the programmer on stock setting. That is always the first place I start
So the codes are for cylinder 3,4,6. If you ohm each injector wire to the middle wire in the harness. Do you get about 2.8 ohms? Sometimes if you have a test vehicle swapping the IDM is a good test as well.