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Social Studies, 26.11.2019 19:31 chynahbug5676

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 ab. both technicians a and bc. neither technician a nor bd. technician b

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