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Two technicians are discussing back pressure. Technician A says that higher exhaust-system pressure leads to lower manifold vacuum. Technician B says that back pressure can be tested with an oxygen sensor, and EGR valve, or an AIR valve. Who is correct? A. Technician A B. Both Technicians A and B C. Technician B D. Neither Technician A nor B
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Answers: 3
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Two technicians are discussing back pressure. Technician A says that higher exhaust-system pressure...
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