204 Auto Engine Performance and Driveability Copyright by Goodheart-Willcox Co., Inc. 9. Technician A says that inspection and maintenance (I/M) programs require emission inspections in some locations. Technician B says that the air pump switching valves are used to switch airfl ow between the exhaust manifold and catalytic converter. Who is right? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B. 10. Air can be injected into the exhaust manifold by all of the following, except: (A) crankcase pressure. (B) exhaust system pulses. (C) electric motor–driven air pump. (D) pulley-driven air pump.